[android_webview] Do not extract webviewchromium.pak

ui/base/resource/resource_bundle.h

Index: ui/base/resource/resource_bundle.h
diff --git a/ui/base/resource/resource_bundle.h b/ui/base/resource/resource_bundle.h
index 9e5b94e22e8cd4d50157118b6dea94f203b3240f..3a6c080e8d45967b73843eae029573df4068f349 100644
--- a/ui/base/resource/resource_bundle.h
+++ b/ui/base/resource/resource_bundle.h
@@ -138,6 +138,12 @@ class UI_BASE_EXPORT ResourceBundle {
   static void InitSharedInstanceWithPakFile(base::File file,
                                             bool should_load_common_resources);
 
+  // Same as InitSharedInstanceWithPakFile, but uses a file region.
+  static void InitSharedInstanceWithPakFileRegion(
+      base::File pak_file,
+      const base::File::Region& region,
+      bool should_load_common_resources);
+
   // Initialize the ResourceBundle using given data pack path for testing.
   static void InitSharedInstanceWithPakPath(const base::FilePath& path);