Adding OverrideStringResource API to ResourceBundle.

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 <vector>
 
 #include "base/big_endian.h"
 #include "base/command_line.h"
@@ skipping 293 matching lines @@
 }
 
 void ResourceBundle::UnloadLocaleResources() {
   locale_resources_data_.reset();
 }
 
 void ResourceBundle::OverrideLocalePakForTest(const base::FilePath& pak_path) {
   overridden_pak_path_ = pak_path;
 }
 
+void ResourceBundle::OverrideLocaleStringResource(
+    int message_id,
+    const base::string16& string) {
+  overridden_locale_strings_[message_id] = string;
+}
+
 const base::FilePath& ResourceBundle::GetOverriddenPakPath() {
   return overridden_pak_path_;
 }
 
 std::string ResourceBundle::ReloadLocaleResources(
     const std::string& pref_locale) {
   base::AutoLock lock_scope(*locale_resources_data_lock_);
+
+  // Remove all overriden strings, as they will not be valid for the new locale.
+  overridden_locale_strings_.clear();
+
   UnloadLocaleResources();
   return LoadLocaleResources(pref_locale);
 }
 
 gfx::ImageSkia* ResourceBundle::GetImageSkiaNamed(int resource_id) {
   const gfx::ImageSkia* image = GetImageNamed(resource_id).ToImageSkia();
   return const_cast<gfx::ImageSkia*>(image);
 }
 
 gfx::Image& ResourceBundle::GetImageNamed(int resource_id) {
@@ skipping 105 matching lines @@
 
 base::string16 ResourceBundle::GetLocalizedString(int message_id) {
   base::string16 string;
   if (delegate_ && delegate_->GetLocalizedString(message_id, &string))
     return string;
 
   // Ensure that ReloadLocaleResources() doesn't drop the resources while
   // we're using them.
   base::AutoLock lock_scope(*locale_resources_data_lock_);
 
+  IdToStringMap::const_iterator it =
+      overridden_locale_strings_.find(message_id);
+  if (it != overridden_locale_strings_.end())
+    return it->second;
+
   // If for some reason we were unable to load the resources , return an empty
   // string (better than crashing).
   if (!locale_resources_data_.get()) {
     LOG(WARNING) << "locale resources are not loaded";
     return base::string16();
   }
 
   base::StringPiece data;
   if (!locale_resources_data_->GetStringPiece(message_id, &data)) {
     // Fall back on the main data pack (shouldn't be any strings here except in
@@ skipping 339 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