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

content/renderer/render_view_impl.h

Index: content/renderer/render_view_impl.h
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index 8deee7f664ccca3595e553450fa86b1d6565855c..6e5cabd66d45820f98fc5af7caafdd1e1ddcef9a 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -765,6 +765,13 @@ class CONTENT_EXPORT RenderViewImpl
     navigation_gesture_ = gesture;
   }
 
+  // Platform specific theme preferences if any are updated here.
+#if defined(OS_WIN)
+  void UpdateThemePrefs();
+#else
+  void UpdateThemePrefs() {}
+#endif
+
   // ---------------------------------------------------------------------------
   // ADDING NEW FUNCTIONS? Please keep private functions alphabetized and put
   // it in the same order in the .cc file as it was in the header.