Adding OverrideStringResource API to ResourceBundle.

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 809b1125159ef939b2cbddb450b36f9f7ed57da4..9a1a904724b62b8d22b504a81e26c434d1e69055 100644
--- a/ui/base/resource/resource_bundle.h
+++ b/ui/base/resource/resource_bundle.h
@@ -245,6 +245,12 @@ class UI_BASE_EXPORT ResourceBundle {
   // loaded. Pass an empty path to undo.
   void OverrideLocalePakForTest(const base::FilePath& pak_path);
 
+  // Overrides a localized string resource with the given string. If no delegate
+  // is present, the |string| will be returned when getting the localized string
+  // |message_id|. This is intended to be used in conjunction with field trials
+  // and the variations service to experiment with different UI strings.
+  void OverrideStringResource(int message_id, const base::string16& string);
+
   // Returns the full pathname of the locale file to load.  May return an empty
   // string if no locale data files are found and |test_file_exists| is true.
   // Used on Android to load the local file in the browser process and pass it
@@ -267,6 +273,8 @@ class UI_BASE_EXPORT ResourceBundle {
   class ResourceBundleImageSource;
   friend class ResourceBundleImageSource;
 
+  typedef base::hash_map<int, base::string16> IdToStringMap;

[grt (UTC plus 2), 2014/06/11 01:51:18]

#include "base/containers/hash_tables.h"

[jwd, 2014/07/03 17:41:31]

Done.

+
   // Ctor/dtor are private, since we're a singleton.
   explicit ResourceBundle(Delegate* delegate);
   ~ResourceBundle();
@@ -391,6 +399,8 @@ class UI_BASE_EXPORT ResourceBundle {
 
   base::FilePath overridden_pak_path_;
 
+  IdToStringMap overridden_strings_;
+
   DISALLOW_COPY_AND_ASSIGN(ResourceBundle);
 };