Implement isRenderingVSynced on RenderWidget

webkit/glue/webpreferences.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/webpreferences.h"
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebNetworkStateNotifier.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebRuntimeFeatures.h"
@@ skipping 61 matching lines @@
       experimental_webgl_enabled(false),
       flash_3d_enabled(true),
       flash_stage3d_enabled(false),
       gl_multisampling_enabled(true),
       privileged_webgl_extensions_enabled(false),
       webgl_errors_to_console_enabled(true),
       show_composited_layer_borders(false),
       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),
       force_compositing_mode(false),
       fixed_position_compositing_enabled(false),
       accelerated_layers_enabled(false),
       accelerated_animation_enabled(false),
       accelerated_video_enabled(false),
       accelerated_2d_canvas_enabled(false),
       deferred_2d_canvas_enabled(false),
@@ skipping 221 matching lines @@
   settings->setShowFPSCounter(show_fps_counter);
 
   // Display the current compositor tree as overlay if requested on
   // the command line
   settings->setShowPlatformLayerTree(show_composited_layer_tree);
 
   // Display visualization of what has changed on the screen using an
   // 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);
 
   // Always enter compositing if requested on the command line.
   settings->setForceCompositingMode(force_compositing_mode);
 
   // Enable compositing for fixed position elements if requested
   // on the command line.
   settings->setAcceleratedCompositingForFixedPositionEnabled(
       fixed_position_compositing_enabled);
@@ skipping 75 matching lines @@
   settings->setMaxUntiledLayerSize(
       WebSize(max_untiled_layer_width, max_untiled_layer_height));
 
   settings->setFixedPositionCreatesStackingContext(
       fixed_position_creates_stacking_context);
 
   WebNetworkStateNotifier::setOnLine(is_online);
 }
 
 }  // namespace webkit_glue