cc: Add command line for frame production throttle

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index a82089103490aee8c1f077445eec589746d245d8..91f4ca81c7723aebd3091145402603a6af0c2da1 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -227,8 +227,14 @@ void RenderWidgetCompositor::Initialize() {
   // to keep content always crisp when possible.
   settings.layer_transforms_should_scale_layer_contents = true;
 
-  settings.renderer_settings.disable_gpu_vsync =
-      cmd->HasSwitch(switches::kDisableGpuVsync);
+  if (cmd->HasSwitch(switches::kDisableGpuVsync)) {
+    std::string displayVsyncStr =

[danakj, 2015/07/14 19:43:42]

display_vsync_string

[Jimmy Jo, 2015/07/15 00:47:27]

Done.

+        cmd->GetSwitchValueASCII(switches::kDisableGpuVsync);
+    settings.renderer_settings.disable_display_vsync =
+        (displayVsyncStr == "gpu" || displayVsyncStr.empty());
+    settings.wait_for_beginframe_interval =
+        !(displayVsyncStr == "beginframe" || displayVsyncStr.empty());
+  }
   settings.main_frame_before_activation_enabled =
       cmd->HasSwitch(cc::switches::kEnableMainFrameBeforeActivation) &&
       !cmd->HasSwitch(cc::switches::kDisableMainFrameBeforeActivation);