[bazel] Remove zlib dependency

That entails that V8 built with bazel does not support
snapshot compression.

NOTE: Snapshot compression has always been supported, but it has never
been enabled. We do not even have a flag for it.

Change-Id: I4b67db618be2c62e6a6f34e71eb0dac2ec26fa36
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3834031
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82537}

BUILD.bazel

@@ -324,7 +324,6 @@ v8_config(
     },
     defines = [
         "GOOGLE3",
-        "CHROMIUM_ZLIB_NO_CHROMECONF",
         "ENABLE_DEBUGGER_SUPPORT",
         "V8_ADVANCED_BIGINT_ALGORITHMS",
         "V8_CONCURRENT_MARKING",
@@ -2091,8 +2090,6 @@ filegroup(
         "src/snapshot/shared-heap-deserializer.cc",
         "src/snapshot/shared-heap-serializer.h",
         "src/snapshot/shared-heap-serializer.cc",
-        "src/snapshot/snapshot-compression.cc",
-        "src/snapshot/snapshot-compression.h",
         "src/snapshot/snapshot-data.cc",
         "src/snapshot/snapshot-data.h",
         "src/snapshot/snapshot-source-sink.cc",
@@ -3575,8 +3572,6 @@ v8_library(
     deps = [
         ":v8_libbase",
         "//external:base_trace_event_common",
-        "//external:zlib",
-        "//external:zlib_compression_utils",
     ],
 )
 

WORKSPACE

@@ -34,22 +34,6 @@ pip_install(
     requirements = "//:bazel/requirements.txt",
 )
 
-new_local_repository(
-    name = "com_googlesource_chromium_zlib",
-    build_file = "bazel/BUILD.zlib",
-    path = "third_party/zlib",
-)
-
-bind(
-    name = "zlib",
-    actual = "@com_googlesource_chromium_zlib//:zlib",
-)
-
-bind(
-    name = "zlib_compression_utils",
-    actual = "@com_googlesource_chromium_zlib//:zlib_compression_utils",
-)
-
 new_local_repository(
     name = "com_googlesource_chromium_icu",
     build_file = "bazel/BUILD.icu",

bazel/BUILD.zlib

@@ -1,70 +0,0 @@
-# Copyright 2021 the V8 project authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-cc_library(
-    name = "zlib",
-    srcs = [
-        "adler32.c",
-        "chromeconf.h",
-        "compress.c",
-        "contrib/optimizations/insert_string.h",
-        "cpu_features.c",
-        "cpu_features.h",
-        "crc32.c",
-        "crc32.h",
-        "deflate.c",
-        "deflate.h",
-        "gzclose.c",
-        "gzguts.h",
-        "gzlib.c",
-        "gzread.c",
-        "gzwrite.c",
-        "infback.c",
-        "inffast.c",
-        "inffast.h",
-        "inffixed.h",
-        "inflate.c",
-        "inflate.h",
-        "inftrees.c",
-        "inftrees.h",
-        "slide_hash_simd.h",
-        "trees.c",
-        "trees.h",
-        "uncompr.c",
-        "zconf.h",
-        "zlib.h",
-        "zutil.c",
-        "zutil.h",
-    ],
-    hdrs = [
-        "zlib.h",
-    ],
-    defines = [
-        "CHROMIUM_ZLIB_NO_CHROMECONF",
-        "CPU_NO_SIMD",
-    ] + select({
-        "@platforms//os:windows": [],
-        "//conditions:default": [
-            "HAVE_HIDDEN",
-        ],
-    }),
-    include_prefix = "third_party/zlib",
-    visibility = ["//visibility:public"],
-)
-
-cc_library(
-    name = "zlib_compression_utils",
-    srcs = [
-        "google/compression_utils_portable.cc",
-    ],
-    hdrs = [
-        "google/compression_utils_portable.h",
-    ],
-    include_prefix = "third_party/zlib",
-    visibility = ["//visibility:public"],
-    copts = ["-Wnodeprecated-non-prototype"],
-    deps = [
-        "//external:zlib",
-    ],
-)