Implement isRenderingVSynced on RenderWidget

BUG=137797


Review URL: https://chromiumcodereview.appspot.com/10826025

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149352 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/web_contents/web_contents_impl.cc

@@ -73,6 +73,7 @@
 #include "ui/base/ui_base_switches.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/screen.h"
+#include "ui/gl/gl_switches.h"
 #include "webkit/glue/web_intent_data.h"
 #include "webkit/glue/web_intent_service_data.h"
 #include "webkit/glue/webpreferences.h"
@@ -476,6 +477,8 @@ WebPreferences WebContentsImpl::GetWebkitPrefs(RenderViewHost* rvh,
       command_line.HasSwitch(switches::kShowFPSCounter);
   prefs.show_paint_rects =
       command_line.HasSwitch(switches::kShowPaintRects);
+  prefs.render_vsync_enabled =
+      !command_line.HasSwitch(switches::kDisableGpuVsync);
   prefs.accelerated_compositing_enabled =
       GpuProcessHost::gpu_enabled() &&
       !command_line.HasSwitch(switches::kDisableAcceleratedCompositing);

content/common/view_messages.h

@@ -188,6 +188,7 @@ IPC_STRUCT_TRAITS_BEGIN(webkit_glue::WebPreferences)
   IPC_STRUCT_TRAITS_MEMBER(show_composited_layer_tree)
   IPC_STRUCT_TRAITS_MEMBER(show_fps_counter)
   IPC_STRUCT_TRAITS_MEMBER(show_paint_rects)
+  IPC_STRUCT_TRAITS_MEMBER(render_vsync_enabled)
   IPC_STRUCT_TRAITS_MEMBER(asynchronous_spell_checking_enabled)
   IPC_STRUCT_TRAITS_MEMBER(unified_textchecker_enabled)
   IPC_STRUCT_TRAITS_MEMBER(accelerated_compositing_enabled)

webkit/glue/webpreferences.cc

@@ -79,6 +79,7 @@ WebPreferences::WebPreferences()
       show_composited_layer_tree(false),
       show_fps_counter(false),
       show_paint_rects(false),
+      render_vsync_enabled(true),
       asynchronous_spell_checking_enabled(true),
       unified_textchecker_enabled(false),
       accelerated_compositing_enabled(false),
@@ -320,6 +321,9 @@ void WebPreferences::Apply(WebView* web_view) const {
   // overlay of rects, if requested on the command line.
   settings->setShowPaintRects(show_paint_rects);
 
+  // Set whether to throttle framerate to Vsync.
+  settings->setRenderVSyncEnabled(render_vsync_enabled);
+
   // Enable gpu-accelerated compositing if requested on the command line.
   settings->setAcceleratedCompositingEnabled(accelerated_compositing_enabled);
 

webkit/glue/webpreferences.h

@@ -97,6 +97,7 @@ struct WEBKIT_GLUE_EXPORT WebPreferences {
   bool show_composited_layer_tree;
   bool show_fps_counter;
   bool show_paint_rects;
+  bool render_vsync_enabled;
   bool asynchronous_spell_checking_enabled;
   bool unified_textchecker_enabled;
   bool accelerated_compositing_enabled;