Use the default theme as the fallback UI in Blink

webkit/glue/webkitplatformsupport_impl.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 "webkit/glue/webkitplatformsupport_impl.h"
 
 #include <math.h>
 
 #include <vector>
 
@@ skipping 45 matching lines @@
 #include "webkit/plugins/webplugininfo.h"
 #include "webkit/user_agent/user_agent.h"
 
 #if defined(OS_ANDROID)
 #include "webkit/glue/fling_animator_impl_android.h"
 #endif
 
 using WebKit::WebAudioBus;
 using WebKit::WebCookie;
 using WebKit::WebData;
+using WebKit::WebFallbackThemeEngine;
 using WebKit::WebLocalizedString;
 using WebKit::WebPluginListBuilder;
 using WebKit::WebString;
 using WebKit::WebSocketStreamHandle;
 using WebKit::WebThemeEngine;
 using WebKit::WebURL;
 using WebKit::WebURLError;
 using WebKit::WebURLLoader;
 using WebKit::WebVector;
 
@@ skipping 302 matching lines @@
 WebKitPlatformSupportImpl::~WebKitPlatformSupportImpl() {
 }
 
 void WebKitPlatformSupportImpl::SetFlingCurveParameters(
     const std::vector<float>& new_touchpad,
     const std::vector<float>& new_touchscreen) {
   fling_curve_configuration_->SetCurveParameters(new_touchpad, new_touchscreen);
 }
 
 WebThemeEngine* WebKitPlatformSupportImpl::themeEngine() {
-  return &theme_engine_;
+  return &native_theme_engine_;
+}
+
+WebFallbackThemeEngine* WebKitPlatformSupportImpl::fallbackThemeEngine() {
+  return &fallback_theme_engine_;
 }
 
 WebURLLoader* WebKitPlatformSupportImpl::createURLLoader() {
   return new WebURLLoaderImpl(this);
 }
 
 WebSocketStreamHandle* WebKitPlatformSupportImpl::createSocketStreamHandle() {
   return new WebSocketStreamHandleImpl(this);
 }
 
@@ skipping 599 matching lines @@
 }
 
 #if defined(OS_ANDROID)
 webkit_media::WebAudioMediaCodecRunner
     WebKitPlatformSupportImpl::GetWebAudioMediaCodecRunner() {
   return base::Bind(&NullRunWebAudioMediaCodec);
 }
 #endif
 
 }  // namespace webkit_glue