Reland of Deduplicate Monochrome locale .paks

ui/base/resource/resource_bundle.h

 // 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.
 
 #ifndef UI_BASE_RESOURCE_RESOURCE_BUNDLE_H_
 #define UI_BASE_RESOURCE_RESOURCE_BUNDLE_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 133 matching lines @@
   // Delete the ResourceBundle for this process if it exists.
   static void CleanupSharedInstance();
 
   // Returns true after the global resource loader instance has been created.
   static bool HasSharedInstance();
 
   // Initialize the ResourceBundle using data pack from given buffer.
   // Return the global resource loader instance.
   static ResourceBundle& GetSharedInstance();
 
+  // Loads a secondary locale data pack using the given file region.
+  void LoadSecondaryLocaleDataWithPakFileRegion(
+      base::File pak_file,
+      const base::MemoryMappedFile::Region& region);
+
   // Check if the .pak for the given locale exists.
   bool LocaleDataPakExists(const std::string& locale);
 
   // Registers additional data pack files with this ResourceBundle.  When
   // looking for a DataResource, we will search these files after searching the
   // main module. |path| should be the complete path to the pack file if known
   // or just the pack file name otherwise (the delegate may optionally override
   // this value). |scale_factor| is the scale of images in this resource pak
   // relative to the images in the 1x resource pak. This method is not thread
   // safe! You should call it immediately after calling InitSharedInstance.
@@ skipping 228 matching lines @@
 
   // This pointer is guaranteed to outlive the ResourceBundle instance and may
   // be NULL.
   Delegate* delegate_;
 
   // Protects |locale_resources_data_|.
   std::unique_ptr<base::Lock> locale_resources_data_lock_;
 
   // Handles for data sources.
   std::unique_ptr<ResourceHandle> locale_resources_data_;
+  std::unique_ptr<ResourceHandle> secondary_locale_resources_data_;
   std::vector<std::unique_ptr<ResourceHandle>> data_packs_;
 
   // The maximum scale factor currently loaded.
   ScaleFactor max_scale_factor_;
 
   // Cached images. The ResourceBundle caches all retrieved images and keeps
   // ownership of the pointers.
   typedef std::map<int, gfx::Image> ImageMap;
   ImageMap images_;
 
@@ skipping 15 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ResourceBundle);
 };
 
 }  // namespace ui
 
 // TODO(beng): Someday, maybe, get rid of this.
 using ui::ResourceBundle;
 
 #endif  // UI_BASE_RESOURCE_RESOURCE_BUNDLE_H_