diff --git a/DEPS b/DEPS
index b3060f7dc9..841df8f38f 100644
--- a/DEPS
+++ b/DEPS
@@ -13,7 +13,7 @@ deps = {
   "third_party/externals/expat"           : "https://android.googlesource.com/platform/external/expat.git@android-6.0.1_r55",
   "third_party/externals/freetype"        : "https://skia.googlesource.com/third_party/freetype2.git@7edc937fe679d14d66f55cf6f7fa607925d38f3c",
   "third_party/externals/harfbuzz"        : "https://skia.googlesource.com/third_party/harfbuzz.git@8be74d85534534dbdd39a0a6f496e26e9f3e661d",
-  "third_party/externals/icu"             : "https://skia.googlesource.com/external/github.com/unicode-org/icu@a96dc7faa584c2408c6fa1e9c61d121d45a33563",
+  "third_party/externals/icu"             : "https://chromium.googlesource.com/chromium/deps/icu.git@407b39301e71006b68bd38e770f35d32398a7b14",
   "third_party/externals/imgui"           : "https://skia.googlesource.com/external/github.com/ocornut/imgui.git@d38d7c6628bebd02692cfdd6fa76b4d992a35b75",
   # TODO: remove jsoncpp after migrating clients to SkJSON
   "third_party/externals/jsoncpp"         : "https://chromium.googlesource.com/external/github.com/open-source-parsers/jsoncpp.git@1.0.0",
diff --git a/gn/skia.gni b/gn/skia.gni
index 5123b10617..a7450aa3cb 100644
--- a/gn/skia.gni
+++ b/gn/skia.gni
@@ -3,5 +3,6 @@
 # found in the LICENSE file.
 
 declare_args() {
-  skia_use_icu = !is_ios
+  skia_use_icu = !is_fuchsia && !is_ios && !is_win  # TODO: Windows
 }
+
diff --git a/third_party/icu/BUILD.gn b/third_party/icu/BUILD.gn
index 73cdd1e89c..e3f5a12fa0 100644
--- a/third_party/icu/BUILD.gn
+++ b/third_party/icu/BUILD.gn
@@ -5,7 +5,6 @@
 
 declare_args() {
   skia_use_system_icu = is_official_build
-  skia_icu_use_prebuilt_data = true
 }
 
 import("../../gn/skia.gni")
@@ -19,86 +18,77 @@ if (skia_use_icu) {
       defines = [ "U_USING_ICU_NAMESPACE=0" ]
     }
   } else {
-    if (target_cpu == "wasm") {
-      _data = "$target_gen_dir/icudtl_dat.cpp"
-      _data_script = "make_data_assembly.py"
-    } else if (is_win) {
-      _data = "$target_gen_dir/icudtl_dat.obj"
-      _data_script = "make_data_obj_win.py"
+    data_assembly = "$target_gen_dir/icudtl_dat.S"
+    data_dir = "../externals/icu/"
+    if (is_android) {
+      data_dir += "android"
+    } else if (is_ios) {
+      data_dir += "ios"
     } else {
-      _data = "$target_gen_dir/icudtl_dat.S"
-      _data_script = "make_data_assembly.py"
+      data_dir += "common"
     }
+    action("make_data_assembly") {
+      script = "../externals/icu/scripts/make_data_assembly.py"
+      inputs = [
+        "$data_dir/icudtl.dat",
+      ]
+      outputs = [
+        "$data_assembly",
+      ]
+      args = [
+        rebase_path(inputs[0], root_build_dir),
+        rebase_path(data_assembly, root_build_dir),
+      ]
+      if (is_mac || is_ios) {
+        args += [ "--mac" ]
+      }
+    }
+
     third_party("icu") {
       public_include_dirs = [
-        "../externals/icu/icu4c/source/common",
-        "../externals/icu/icu4c/source/i18n",
+        "../externals/icu/source/common",
+        "../externals/icu/source/i18n",
         ".",
       ]
       public_defines = [
         "U_USING_ICU_NAMESPACE=0",
-        "U_STATIC_IMPLEMENTATION",
         "SK_USING_THIRD_PARTY_ICU",
       ]
       configs -= [ "//gn:no_rtti" ]
-      deps = [
-        ":assemble_data",
-      ]
-      sources = icu_sources
-      sources += [ _data ]
       defines = [
         # http://userguide.icu-project.org/howtouseicu
-        "U_ENABLE_DYLOAD=0",
-        "U_NOEXCEPT=",
         "U_COMMON_IMPLEMENTATION",
+        "U_STATIC_IMPLEMENTATION",
+        "U_ENABLE_DYLOAD=0",
         "U_I18N_IMPLEMENTATION",
       ]
+      sources = icu_sources
       if (is_win) {
-        defines += [ "U_PLATFORM_HAS_WINUWP_API=1" ]
-      }
-    }
-    _dat_file = "$target_gen_dir/icu.dat"
-    action("assemble_data") {
-      script = _data_script
-      sources = [
-        _dat_file,
-      ]
-      outputs = [
-        _data,
-      ]
-      args = [
-        icu_dtname,
-        current_os,
-        target_cpu,
-        rebase_path(_dat_file, root_build_dir),
-        rebase_path(_data, root_build_dir),
-      ]
-      deps = [
-        ":get_data",
-      ]
-    }
-    if (skia_icu_use_prebuilt_data) {
-      action("get_data") {
-        script = "download_file.py"
-        outputs = [
-          _dat_file,
+        deps = [
+          ":icudata",
         ]
-        args = [
-          "https://storage.googleapis.com/$icu_dat_bucket/$icu_dat_md5",
-          icu_dat_md5,
-          rebase_path(_dat_file, root_build_dir),
+        public_defines += [
+          "U_NOEXCEPT=",
+          "U_STATIC_IMPLEMENTATION",
+        ]
+        libs = [ "Advapi32.lib" ]
+        sources += [ "../externals/icu/source/stubdata/stubdata.cpp" ]
+      } else {
+        sources += [ "$data_assembly" ]
+        deps = [
+          ":make_data_assembly",
         ]
       }
-    } else {
-      action("get_data") {
-        script = "build_icu_data_file.py"
+    }
+    if (is_win) {
+      copy("icudata") {
+        sources = [
+          "../externals/icu/windows/icudt.dll",
+        ]
         outputs = [
-          _dat_file,
-        ]
-        args = [
-          rebase_path("../externals/icu", root_build_dir),
-          rebase_path(_dat_file, root_build_dir),
+          "$root_out_dir/icudt.dll",
         ]
+        data = outputs
       }
     }
   }
diff --git a/third_party/icu/README.md b/third_party/icu/README.md
deleted file mode 100644
index 4c1c57f0ef..0000000000
--- a/third_party/icu/README.md
+++ /dev/null
@@ -1,47 +0,0 @@
-# ICU
-
-If the GN variable `use_icu` is set and `skia_use_system_icu` is unset, then
-the build system will build ICU from the source.  The repository in
-`../externals/icu` is a mirror of the Unicode Consortium's repository.
-
-ICU requires a platform-independent data file, which it does not provide in its
-repository.  The data file can be built by first building the ICU tools to
-process the provided source data, but this is a giant hassle for building ICU
-in a cross-platform way (which might necessitate building ICU twice).
-
-icu/BUILD.gn has two action build rules: `get_data` and `assemble_data`.
-`get_data` downloads the `icu.dat` file if it is not already downloaded.  The
-Google Cloud Storage location of the file is content-addressed with the
-`icu_dat_md5` GN variable found in `icu.gni`.
-
-`assemble_data` will produce either a C++ source file (for our WASM build), an
-object file (for our Windows builds), or a assembly file (for everything else).
-These files will contain a single exported symbol, `icudtNN_dat` which points
-at a block of data containing the contents of the `icu.dat` file.
-
-This build also provides the `SkLoadICU` function, which must be called on
-Windows for some reason.
-
-## How To Update ICU Dependency
-
-When we update the ICU branch, we will use the `update_icu.sh` script to
-update the `icu.gni` file and produce a new `.dat` file for upload.
-
-1)  Edit `DEPS` file.
-
-2)  Run update script:
-
-        third_party/icu/update_icu.sh
-
-3)  Upload new data file.  `DATA_FILE` and `GS_URL` will be provided by the
-    output of the previous step.
-
-        gsutil cp DATA_FILE GS_URL
-
-4)  Commit:
-
-        git add DEPS third_party/icu/icu.gni
-        git commit -m 'DEPS: update ICU'
-        git push origin @:refs/for/master
-        bin/sysopen https://review.skia.org/$(bin/gerrit-number @)
-
diff --git a/third_party/icu/SkLoadICU.h b/third_party/icu/SkLoadICU.h
index 94cad21f81..c443347290 100644
--- a/third_party/icu/SkLoadICU.h
+++ b/third_party/icu/SkLoadICU.h
@@ -11,20 +11,40 @@
 
 #ifdef SK_BUILD_FOR_WIN
 
+#include "../private/SkLeanWindows.h"
+
+#include "unicode/uvernum.h"
 #include "unicode/udata.h"
 
-extern "C" const char U_ICUDATA_ENTRY_POINT[];
+#define ICU_UTIL_DATA_SYMBOL "icudt" U_ICU_VERSION_SHORT "_dat"
+#define ICU_UTIL_DATA_SHARED_MODULE_NAME "icudt.dll"
 
-static inline void SkLoadICU() {
-    UErrorCode udata_setCommonData_error = U_ZERO_ERROR;
-    udata_setCommonData(&U_ICUDATA_ENTRY_POINT, &udata_setCommonData_error);
-    SkASSERT_RELEASE(udata_setCommonData_error == U_ZERO_ERROR);
-
-    UErrorCode udata_setFileAccess_error = U_ZERO_ERROR;
-    udata_setFileAccess(UDATA_NO_FILES, &udata_setFileAccess_error);
-    SkASSERT_RELEASE(udata_setFileAccess_error == U_ZERO_ERROR);
+inline void SkLoadICU() {
+    HMODULE module = LoadLibraryA(ICU_UTIL_DATA_SHARED_MODULE_NAME);
+    if (!module) {
+        SK_ABORT("Failed to load " ICU_UTIL_DATA_SHARED_MODULE_NAME "\n");
+    }
+    FARPROC addr = GetProcAddress(module, ICU_UTIL_DATA_SYMBOL);
+    if (!addr) {
+        SK_ABORT("Symbol " ICU_UTIL_DATA_SYMBOL " missing in "
+                 ICU_UTIL_DATA_SHARED_MODULE_NAME ".\n");
+    }
+    UErrorCode err = U_ZERO_ERROR;
+    udata_setCommonData(reinterpret_cast<void*>(addr), &err);
+    if (err != U_ZERO_ERROR) {
+        SkDebugf("udata_setCommonData() returned %d.\n", (int)err);
+        SK_ABORT("");
+    }
+    udata_setFileAccess(UDATA_ONLY_PACKAGES, &err);
+    if (err != U_ZERO_ERROR) {
+        SkDebugf("udata_setFileAccess() returned %d.\n", (int)err);
+        SK_ABORT("");
+    }
 }
 
+#undef ICU_UTIL_DATA_SHARED_MODULE_NAME
+#undef ICU_UTIL_DATA_SYMBOL
+
 #else
 inline void SkLoadICU() {}
 #endif  // SK_BUILD_FOR_WIN
diff --git a/third_party/icu/build_icu_data_file.py b/third_party/icu/build_icu_data_file.py
deleted file mode 100755
index 191b856354..0000000000
--- a/third_party/icu/build_icu_data_file.py
+++ /dev/null
@@ -1,53 +0,0 @@
-#! /usr/bin/env python
-# Copyright 2019 Google LLC.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-'''
-Builds ICU from a clean repository and saves the data file.
-'''
-
-import glob
-import os
-import shutil
-import subprocess
-import sys
-import tempfile
-
-def build_icu(icu_source_repository, destination):
-    if sys.platform.startswith('linux'):
-        cur_os = 'Linux'
-    elif sys.platform.startswith('darwin'):
-        cur_os = 'MacOSX'
-    else:
-        sys.exit(1)
-
-    cwd = os.getcwd()
-    assert os.path.exists(icu_source_repository)
-    icu_source_repository = os.path.abspath(icu_source_repository)
-    configure = icu_source_repository + '/icu4c/source/runConfigureICU'
-    assert os.path.exists(configure)
-    destination = os.path.abspath(destination)
-    tmp = tempfile.mkdtemp()
-    os.chdir(tmp)
-    icuflags = ['-DU_CHARSET_IS_UTF8=1',
-                '-DU_NO_DEFAULT_INCLUDE_UTF_HEADERS=1',
-                '-DU_HIDE_OBSOLETE_UTF_OLD_H=1']
-    env_copy = os.environ.copy()
-    env_copy['CPPFLAGS'] = ' '.join(icuflags)
-    subprocess.check_call([configure,
-                           cur_os,
-                           '--enable-static',
-                           '--disable-shared',
-                           '--with-data-packaging=archive'],
-                          env=env_copy)
-    subprocess.check_call(['make', '-j'])
-    data_files = glob.glob('data/out/icudt*.dat')
-    assert len(data_files) == 1
-    shutil.move(data_files[0], destination)
-    os.chdir(cwd)
-    shutil.rmtree(tmp)
-
-if __name__ == '__main__':
-    print '\n'.join('>>>  %r' % a for a in sys.argv)
-    build_icu(sys.argv[1], sys.argv[2])
diff --git a/third_party/icu/download_file.py b/third_party/icu/download_file.py
deleted file mode 100755
index 672ae426b9..0000000000
--- a/third_party/icu/download_file.py
+++ /dev/null
@@ -1,26 +0,0 @@
-#! /usr/bin/env python
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-'''
-Download from URL to PATH only if the MD5 checksum does not match.
-'''
-
-import os
-import sys
-import urllib
-
-import hasher
-
-def download(url, md5, path):
-    if md5 == hasher.hash_file('md5', path):
-        return
-    dirname = os.path.dirname(path)
-    if dirname and not os.path.exists(dirname):
-        os.makedirs(dirname)
-    urllib.urlretrieve(url, path)
-    assert md5 == hasher.hash_file('md5', path)
-
-if __name__ == '__main__':
-    print '\n'.join('>>>  %r' % a for a in sys.argv)
-    download(sys.argv[1], sys.argv[2], sys.argv[3])
diff --git a/third_party/icu/hasher.py b/third_party/icu/hasher.py
deleted file mode 100755
index adf515ff8e..0000000000
--- a/third_party/icu/hasher.py
+++ /dev/null
@@ -1,26 +0,0 @@
-#! /usr/bin/env python
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-'''
-Return the checksum of FILENAME, using the given ALGORITHM
-'''
-
-import hashlib
-import mmap
-import os
-import sys
-
-def hash_file(algorithm, filename):
-    assert algorithm in hashlib.algorithms
-    if not os.path.exists(filename):
-        return ''
-    h = hashlib.new(algorithm)
-    with open(filename, 'rb') as f:
-        m = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
-        h.update(m)
-        m.close()
-    return h.hexdigest()
-
-if __name__ == '__main__':
-    sys.stdout.write(hash_file(sys.argv[1], sys.argv[2]) + '\n')
diff --git a/third_party/icu/icu.gni b/third_party/icu/icu.gni
index 9a881bf0d7..2c32fa9f92 100644
--- a/third_party/icu/icu.gni
+++ b/third_party/icu/icu.gni
@@ -1,10 +1,7 @@
 # Copyright 2019 Google LLC.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
-icu_dtname = "icudt63_dat"
-icu_dat_md5 = "6217818389487f8540fb0adff2c3e5b5"
-icu_dat_bucket = "skia-icu-data"
-_src = "../externals/icu/icu4c/source"
+_src = "../externals/icu/source"
 icu_sources = [
   "$_src/common/appendable.cpp",
   "$_src/common/bmpset.cpp",
diff --git a/third_party/icu/make_data_assembly.py b/third_party/icu/make_data_assembly.py
deleted file mode 100755
index a4a4870210..0000000000
--- a/third_party/icu/make_data_assembly.py
+++ /dev/null
@@ -1,57 +0,0 @@
-#!/usr/bin/env python
-
-# Copyright 2019 Google LLC.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-'''
-Generate a source file containing the given binary data.
-
-File type is either assembly or C++, depending on platform.
-'''
-
-import os
-import struct
-import sys
-import mmap
-
-def iterate_as_uint32(path):
-    with open(path, 'rb') as f:
-        s = struct.Struct('@I')
-        assert s.size == 4
-        mm = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
-        assert (len(mm) % s.size) == 0
-        for offset in xrange(0, len(mm), s.size):
-            yield s.unpack_from(mm, offset)[0]
-        mm.close()
-
-
-def convert(fmt, name, src_path, dst_path):
-    header, line_begin, line_end, footer = fmt
-    assert os.path.exists(src_path)
-    src = iterate_as_uint32(src_path)
-    with open(dst_path, 'w') as o:
-        o.write(header.format(name))
-        while True:
-            line = ','.join('%d' % v for _, v in zip(range(8), src))
-            if not line:
-                break
-            o.write('%s%s%s\n' % (line_begin, line, line_end))
-        o.write(footer.format(name))
-
-
-gcc_asm = ('.globl {0}\n.balign 16\n{0}:\n', '.long ', '', '')
-
-cpp = ('#include <cstdint>\nextern "C" uint32_t {0}[] __attribute__((aligned(16))) = {{\n',
-       '', ',', '}};\n')
-
-def main(name, current_os, target_cpu, src, dst):
-    wasm = target_cpu == 'wasm'
-    fmt = gcc_asm if not wasm else cpp
-    if not wasm and current_os in ['mac', 'ios', 'tvos']:
-        name = '_' + name
-    convert(fmt, name, src, dst)
-
-if __name__ == '__main__':
-    print '\n'.join('>>>  %r' % x for x in sys.argv)
-    main(sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4], sys.argv[5])
diff --git a/third_party/icu/make_data_obj_win.py b/third_party/icu/make_data_obj_win.py
deleted file mode 100755
index 020d928dc7..0000000000
--- a/third_party/icu/make_data_obj_win.py
+++ /dev/null
@@ -1,55 +0,0 @@
-#! /usr/bin/env python
-
-# Copyright 2019 Google LLC.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-'''
-Generate a Windows object file containing the given binary data.
-'''
-
-import sys
-import mmap
-import struct
-import time
-
-def write_windows_obj(symbol_name, target_cpu, src_path, dst_path):
-    machine_codes = {'x86'   : 0x014C,
-                     'x64'   : 0x8664,
-                     'arm'   : 0x01C0,
-                     'arm64' : 0xAA64}
-    if target_cpu == 'x86':
-        symbol_name = '_' + symbol_name
-    assert target_cpu in machine_codes
-    src_file = open(src_path, 'rb')
-    src = mmap.mmap(src_file.fileno(), 0, access=mmap.ACCESS_READ)
-    image_file_header = struct.Struct('HHIIIHH')
-    image_section_header = struct.Struct('8sIIIIIIHHI')
-    linker_options = '-export:' + symbol_name + ',data '
-    header_len = image_file_header.size + 2 * image_section_header.size
-    opts_length = len(linker_options)
-    file_header = image_file_header.pack(machine_codes[target_cpu], 2,
-            int(time.time()), header_len + opts_length + len(src), 1, 0, 0)
-    section1_header = image_section_header.pack(
-            '.drectve', 0, 0, opts_length, header_len,
-            0, 0, 0, 0, 0x00100A00)
-    section2_header = image_section_header.pack(
-            '.rdata', 0, 0, len(src), header_len + opts_length,
-            0, 0, 0, 0, 0x40100000)
-    symbols = struct.pack('IIIHHBB', 0, 4, 0, 2, 0, 2, 0)
-    symbol_names = struct.pack('I', 5 + len(symbol_name)) + symbol_name + '\000'
-    with open(dst_path, 'wb') as o:
-        o.write(file_header)
-        o.write(section1_header)
-        o.write(section2_header)
-        o.write(linker_options)
-        o.write(src)
-        o.write(symbols)
-        o.write(symbol_names)
-    src.close()
-    src_file.close()
-
-
-if __name__ == '__main__':
-    print '\n'.join('>>>  %r' % a for a in sys.argv)
-    write_windows_obj(sys.argv[1], sys.argv[3], sys.argv[4], sys.argv[5])
diff --git a/third_party/icu/update_icu.sh b/third_party/icu/update_icu.sh
deleted file mode 100755
index 6c600289d5..0000000000
--- a/third_party/icu/update_icu.sh
+++ /dev/null
@@ -1,48 +0,0 @@
-#! /bin/sh
-
-# Copyright 2019 Google LLC.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Run this script after updating ../../DEPS to point at a new revision of ICU.
-
-set -x -e
-
-DATA_TMP="$(mktemp "${TMPDIR:-/tmp}/icu_dat.XXXXXXXXXX";)"
-cd "$(dirname "$0")"
-python ../../tools/git-sync-deps
-python ./build_icu_data_file.py ../externals/icu "$DATA_TMP"
-UVERNUM_FILE=../externals/icu/icu4c/source/common/unicode/uvernum.h
-UVERNUM_SEDCMD='s/^#define U_ICU_VERSION_MAJOR_NUM \([1-9][0-9]*\)$/\1/p'
-SYMBOL="icudt$(sed -n "$UVERNUM_SEDCMD" "$UVERNUM_FILE")_dat"
-CHECKSUM="$(python ./hasher.py 'md5' "$DATA_TMP")"
-
-BUCKET='skia-icu-data'
-SRC='../externals/icu/icu4c/source'
-{
-    cat <<- EOM
-	# Copyright $(date +%Y) Google LLC.
-	# Use of this source code is governed by a BSD-style license that can be
-	# found in the LICENSE file.
-	icu_dtname = "${SYMBOL}"
-	icu_dat_md5 = "${CHECKSUM}"
-	icu_dat_bucket = "${BUCKET}"
-	_src = "$SRC"
-	icu_sources = [
-	EOM
-    find $SRC/common $SRC/i18n -name '*.cpp' -o -name '*.h' -o -name '*.c' | \
-        LANG= sort | \
-        sed "s#^${SRC}/\(.*\)\$#  \"\$_src/\1\",#"
-    printf ']\n'
-} > icu.gni
-
-set +x +e
-URL="https://storage.googleapis.com/${BUCKET}/$CHECKSUM"
-if [ "$(curl -s -I "$URL" | head -n 1|cut -d' ' -f2)" != 200 ]; then
-    echo "TODO: upload the dat file:"
-    echo "  gsutil cp '$DATA_TMP' 'gs://${BUCKET}/$CHECKSUM'"
-else
-    echo "DAT file is already here: $URL"
-fi
-echo SUCCESS
-echo '( git add third_party/icu/icu.gni )'