Avoid calling the GetSystemMetrics API in the renderer process on Windows to get the scrollbar metr…

content/child/webthemeengine_impl_default.h

 // Copyright 2014 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 CONTENT_CHILD_WEBTHEMEENGINE_IMPL_DEFAULT_H_
 #define CONTENT_CHILD_WEBTHEMEENGINE_IMPL_DEFAULT_H_
 
 #include "third_party/WebKit/public/platform/WebThemeEngine.h"
 
 namespace content {
 
 class WebThemeEngineImpl : public blink::WebThemeEngine {
  public:
   // WebThemeEngine methods:
   virtual blink::WebSize getSize(blink::WebThemeEngine::Part);
   virtual void paint(
       blink::WebCanvas* canvas,
       blink::WebThemeEngine::Part part,
       blink::WebThemeEngine::State state,
       const blink::WebRect& rect,
       const blink::WebThemeEngine::ExtraParams* extra_params);
   virtual void paintStateTransition(blink::WebCanvas* canvas,
                                     blink::WebThemeEngine::Part part,
                                     blink::WebThemeEngine::State startState,
                                     blink::WebThemeEngine::State endState,
                                     double progress,
                                     const blink::WebRect& rect);
+
+#if defined(OS_WIN)
+  // Caches the scrollbar metrics.
+  static void CacheScrollBarMetrics(int32 vertical_scroll_bar_width,

[cpu_(ooo_6.6-7.5), 2015/04/06 20:22:08]

looks like this file is webkit style so please change to webkit style naming, I
guess in this case cacheScrollBarMetrics

[ananta, 2015/04/06 20:42:03]

Done.

+                                    int32 horizontal_scroll_bar_height,
+                                    int32 vertical_arrow_bitmap_height,
+                                    int32 horizontal_arrow_bitmap_width);
+#endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEBTHEMEENGINE_IMPL_DEFAULT_H_