[android_webview] Do not extract webviewchromium.pak

ui/base/resource/resource_bundle.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/resource/resource_bundle.h"
 
 #include <limits>
 #include <vector>
 
 #include "base/big_endian.h"
@@ skipping 158 matching lines @@
     const std::string& pref_locale, Delegate* delegate) {
   InitSharedInstance(delegate);
   std::string result = g_shared_instance_->LoadLocaleResources(pref_locale);
   InitDefaultFontList();
   return result;
 }
 
 // static
 void ResourceBundle::InitSharedInstanceWithPakFile(
     base::File pak_file, bool should_load_common_resources) {
+  InitSharedInstanceWithPakFileRegion(pak_file.Pass(),
+                                      base::File::Region::WholeFile(),
+                                      should_load_common_resources);
+}
+
+// static
+void ResourceBundle::InitSharedInstanceWithPakFileRegion(
+    base::File pak_file,
+    const base::File::Region& region,
+    bool should_load_common_resources) {
   InitSharedInstance(NULL);
   if (should_load_common_resources)
     g_shared_instance_->LoadCommonResources();
 
   scoped_ptr<DataPack> data_pack(
       new DataPack(SCALE_FACTOR_100P));
-  if (!data_pack->LoadFromFile(pak_file.Pass())) {
+  if (!data_pack->LoadFromFileRegion(pak_file.Pass(), region)) {
     NOTREACHED() << "failed to load pak file";
     return;
   }
   g_shared_instance_->locale_resources_data_.reset(data_pack.release());
   InitDefaultFontList();
 }
 
 // static
 void ResourceBundle::InitSharedInstanceWithPakPath(const base::FilePath& path) {
   InitSharedInstance(NULL);
@@ skipping 644 matching lines @@
 // static
 bool ResourceBundle::DecodePNG(const unsigned char* buf,
                                size_t size,
                                SkBitmap* bitmap,
                                bool* fell_back_to_1x) {
   *fell_back_to_1x = PNGContainsFallbackMarker(buf, size);
   return gfx::PNGCodec::Decode(buf, size, bitmap);
 }
 
 }  // namespace ui