[gmscore] Allow specifying resource files to whitelist for preprocess

BUG=599954

Review URL: https://codereview.chromium.org/1849403003

Cr-Original-Commit-Position: refs/heads/master@{#386970}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 577d5e394ee173323c0df50d451e379e76e37b6a

android/play_services/preprocess.py

@@ -125,7 +125,7 @@ def ProcessGooglePlayServices(repo, out_dir, config_path, is_extracted_repo):
       _ImportFromAars(config, tmp_paths, repo)
 
     _GenerateCombinedJar(tmp_paths)
-    _ProcessResources(config, tmp_paths)
+    _ProcessResources(config, tmp_paths, repo)
     _BuildOutput(config, tmp_paths, out_dir)
   finally:
     shutil.rmtree(tmp_root)
@@ -199,7 +199,7 @@ def _GenerateCombinedJar(tmp_paths):
   cmd_helper.Call(['jar', '-cf', out_file_name, '-C', working_dir, '.'])
 
 
-def _ProcessResources(config, tmp_paths):
+def _ProcessResources(config, tmp_paths, repo):
   LOCALIZED_VALUES_BASE_NAME = 'values-'
   locale_whitelist = set(config.locale_whitelist)
 
@@ -216,6 +216,17 @@ def _ProcessResources(config, tmp_paths):
       if dir_locale not in locale_whitelist:
         shutil.rmtree(res_dir)
 
+  # Reimport files from the whitelist.
+  for res_path in config.resource_whitelist:
+    for whitelisted_file in glob.glob(os.path.join(repo, res_path)):
+      resolved_file = os.path.relpath(whitelisted_file, repo)
+      rebased_res = os.path.join(tmp_paths['imported_clients'], resolved_file)
+
+      if not os.path.exists(os.path.dirname(rebased_res)):
+        os.makedirs(os.path.dirname(rebased_res))
+
+      shutil.copy(os.path.join(repo, whitelisted_file), rebased_res)
+
 
 def _BuildOutput(config, tmp_paths, out_dir):
   generation_date = datetime.utcnow()

android/play_services/utils.py

@@ -65,6 +65,11 @@ class ConfigParser(object):
       `//chrome/app/generated_resources.grd`
       Example: ["am", "ar", "bg", "ca", "cs"]
 
+   - resource_whitelist
+     List of strings. List of resource files to explicitely keep in the final
+     output. Use it to keep drawables for example, as we currently remove them
+     all.
+     Example: ["play-services-base/res/drawables/foobar.xml"]
   '''
   _VERSION_NUMBER_KEY = 'version_number'
 
@@ -95,6 +100,10 @@ class ConfigParser(object):
   def locale_whitelist(self):
     return self._data.get('locale_whitelist') or []
 
+  @property
+  def resource_whitelist(self):
+    return self._data.get('resource_whitelist') or []
+
   def UpdateVersionNumber(self, new_version_number):
     '''Updates the version number and saves it in the configuration file. '''