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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 98 matching lines @@
                                     base::StringPiece* value) = 0;
 
     // Retrieve a localized string. Return true if a string was provided or
     // false to attempt retrieval of the default string.
     virtual bool GetLocalizedString(int message_id, base::string16* value) = 0;
 
    protected:
     virtual ~Delegate() {}
   };
 
+  // A class which is designed to be instantiated on the stack during early
+  // startup code that needs access to string resources before the
+  // ResourceBundle may be loaded.
+  //
+  // This incurs a performance hit, so this should only be used in exceptional
+  // circumstances.  Most uses of resources should wait until after the
+  // ResourceBundle has been loaded properly.
+  class UI_BASE_EXPORT TemporaryLoader {
+   public:
+    TemporaryLoader();
+    ~TemporaryLoader();
+
+   private:
+    // Mac loads resources earlier than other platforms and thus may have
+    // already initialized the resource bundle when we're constructed.  Instead
+    // of trying to ifdef Mac or otherwise define exactly when we should and
+    // shouldn't load, we just set this based on whether the shared instance
+    // exists and then do nothing if it's set.
+    bool already_loaded_;
+
+    DISALLOW_COPY_AND_ASSIGN(TemporaryLoader);
+  };
+
   // Initialize the ResourceBundle for this process. Does not take ownership of
   // the |delegate| value. Returns the language selected.
   // NOTE: Mac ignores this and always loads up resources for the language
   // defined by the Cocoa UI (i.e., NSBundle does the language work).
   //
   // TODO(sergeyu): This method also loads common resources (i.e. chrome.pak).
   // There is no way to specify which resource files are loaded, i.e. names of
   // the files are hardcoded in ResourceBundle. Fix it to allow to specify which
   // files are loaded (e.g. add a new method in Delegate).
   // |load_resources| controls whether or not LoadCommonResources is called.
@@ skipping 314 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_