Add trivial theming support in extensions....

chrome/common/resource_bundle.h

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2006-2009 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 CHROME_COMMON_RESOURCE_BUNDLE_H__
 #define CHROME_COMMON_RESOURCE_BUNDLE_H__
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/lock.h"
 #include "base/scoped_ptr.h"
+#include "chrome/browser/extensions/extension.h"
 
 #if defined(OS_LINUX) || defined(OS_MACOSX)
 namespace base {
   class DataPack;
 };
 #endif
 #if defined(OS_LINUX)
 typedef struct _GdkPixbuf GdkPixbuf;
 #endif
 class ChromeFont;
+class Extension;
 class SkBitmap;
 class StringPiece;
 
 // ResourceBundle is a central facility to load images and other resources,
 // such as theme graphics.
 // Every resource is loaded only once.
 class ResourceBundle {
  public:
   // An enumeration of the various font styles used throughout Chrome.
   // The following holds true for the font sizes:
@@ skipping 70 matching lines @@
   // Loads and returns the global accelerators.
   HACCEL GetGlobalAccelerators();
 
   // Loads and returns a cursor from the app module.
   HCURSOR LoadCursor(int cursor_id);
 #elif defined(OS_LINUX)
   // Load a theme image as a GdkPixbuf.
   GdkPixbuf* LoadPixbuf(int resource_id);
 #endif
 
+  // Sets an Extension object that can handle theme resource requests.
+  void SetThemeExtension(const Extension& e);
+
  private:
   // We define a DataHandle typedef to abstract across how data is stored
   // across platforms.
 #if defined(OS_WIN)
   // Windows stores resources in DLLs, which are managed by HINSTANCE.
   typedef HINSTANCE DataHandle;
 #elif defined(OS_LINUX) || defined(OS_MACOSX)
   // Linux uses base::DataPack.
   typedef base::DataPack* DataHandle;
 #endif
@@ skipping 45 matching lines @@
   // The various fonts used. Cached to avoid repeated GDI creation/destruction.
   scoped_ptr<ChromeFont> base_font_;
   scoped_ptr<ChromeFont> small_font_;
   scoped_ptr<ChromeFont> medium_font_;
   scoped_ptr<ChromeFont> medium_bold_font_;
   scoped_ptr<ChromeFont> large_font_;
   scoped_ptr<ChromeFont> web_font_;
 
   static ResourceBundle* g_shared_instance_;
 
+  scoped_ptr<Extension> theme_extension_;
+
   DISALLOW_EVIL_CONSTRUCTORS(ResourceBundle);
 };
 
 #endif // CHROME_COMMON_RESOURCE_BUNDLE_H__