SkQP: Slimmer APKS

Currently produces 30% smaller APKs.

No-Try: true
Change-Id: Ic04b4bebef78e9a3f8b8dde4bace78ce74e43d66
Reviewed-on: https://skia-review.googlesource.com/106165
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>

tools/skqp/make_universal_apk

@@ -22,6 +22,9 @@ locations of the Android NDK and SDK.  Current values:
 
 Additionally, \`python\` and \`ninja\` should be in your path.
 
+If SKQP_EXTRA_MODELS is non-empty, assets unneeded by the CTS tests will be
+included for experimental mode.
+
 EOM
     exit 1
 }
@@ -37,7 +40,14 @@ set -e # Exit immediately
 
 cd "$(dirname "$0")/../.."
 
+
+git clean -fxd platform_tools/android/apps/skqp
+
 python tools/skqp/download_model
+if [ -z "$SKQP_EXTRA_MODELS" ]; then
+    python tools/skqp/remove_unneeded_assets
+fi
+
 python tools/skqp/setup_resources
 python tools/git-sync-deps
 

tools/skqp/remove_unneeded_assets

@@ -0,0 +1,34 @@
+#! /usr/bin/env python
+
+# Copyright 2018 Google Inc.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import shutil
+import sys
+
+def gset(path):
+    s = set()
+    if os.path.isfile(path):
+        with open(path, 'r') as f:
+            for line in f:
+                s.add(line.strip())
+    return s
+
+def main():
+    assets = os.path.join('platform_tools', 'android', 'apps', 'skqp', 'src', 'main', 'assets')
+    os.chdir(os.path.join(os.path.dirname(__file__), os.pardir, os.pardir, assets))
+    known = gset('skqp/KnownGMs.txt')
+    nope = gset('skqp/DoNotScoreInCompatibilityTestMode.txt')
+    present = set(os.listdir('gmkb'))
+    to_delete = present & nope
+    if (known):
+        to_delete |= (present - known)
+    for x in to_delete:
+        shutil.rmtree(os.path.join('gmkb', x))
+    sys.stdout.write('%s: %d of %d models removed\n' %(sys.argv[0], len(to_delete), len(present)))
+
+if __name__ == '__main__':
+    main()
+