Use the default theme as the fallback UI in Blink

webkit/glue/webkitplatformsupport_impl.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 WEBKIT_PLATFORM_SUPPORT_IMPL_H_
 #define WEBKIT_PLATFORM_SUPPORT_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/debug/trace_event.h"
 #include "base/platform_file.h"
 #include "base/threading/thread_local_storage.h"
 #include "base/timer.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/Platform.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebURLError.h"
 #include "ui/base/layout.h"
 #include "webkit/glue/resource_loader_bridge.h"
+#include "webkit/glue/webfallbackthemeengine_impl.h"
 #include "webkit/glue/webkit_glue_export.h"
 
 #if defined(USE_DEFAULT_RENDER_THEME)
 #include "webkit/glue/webthemeengine_impl_default.h"
 #elif defined(OS_WIN)
 #include "webkit/glue/webthemeengine_impl_win.h"
 #elif defined(OS_MACOSX)
 #include "webkit/glue/webthemeengine_impl_mac.h"
 #elif defined(OS_ANDROID)
 #include "webkit/glue/webthemeengine_impl_android.h"
@@ skipping 23 matching lines @@
  public:
   WebKitPlatformSupportImpl();
   virtual ~WebKitPlatformSupportImpl();
 
   void SetFlingCurveParameters(
     const std::vector<float>& new_touchpad,
     const std::vector<float>& new_touchscreen);
 
   // Platform methods (partial implementation):
   virtual WebKit::WebThemeEngine* themeEngine();
+  virtual WebKit::WebFallbackThemeEngine* fallbackThemeEngine();
 
   virtual base::PlatformFile databaseOpenFile(
       const WebKit::WebString& vfs_file_name, int desired_flags);
   virtual int databaseDeleteFile(const WebKit::WebString& vfs_file_name,
                                  bool sync_dir);
   virtual long databaseGetFileAttributes(
       const WebKit::WebString& vfs_file_name);
   virtual long long databaseGetFileSize(const WebKit::WebString& vfs_file_name);
   virtual long long databaseGetSpaceAvailableForOrigin(
       const WebKit::WebString& origin_identifier);
@@ skipping 109 matching lines @@
       shared_timer_func_();
   }
   static void DestroyCurrentThread(void*);
 
   base::MessageLoop* main_loop_;
   base::OneShotTimer<WebKitPlatformSupportImpl> shared_timer_;
   void (*shared_timer_func_)();
   double shared_timer_fire_time_;
   bool shared_timer_fire_time_was_set_while_suspended_;
   int shared_timer_suspended_;  // counter
-  WebThemeEngineImpl theme_engine_;
+  WebThemeEngineImpl native_theme_engine_;
+  WebFallbackThemeEngineImpl fallback_theme_engine_;
   base::ThreadLocalStorage::Slot current_thread_slot_;
   scoped_ptr<FlingCurveConfiguration> fling_curve_configuration_;
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_PLATFORM_SUPPORT_IMPL_H_