Dynamically set CAOpenGLLAyer to be asynchronous

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index 510dec1e135d990e89ed2b10e04093964c7e7f18..ce23b6606b2b03fb7e22278db70c37be14916e30 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -408,6 +408,9 @@ RenderWidgetHostViewMac::RenderWidgetHostViewMac(RenderWidgetHost* widget)
       last_frame_was_accelerated_(false),
       text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
       can_compose_inline_(true),
+      compositing_iosurface_layer_async_timer_(
+            FROM_HERE, base::TimeDelta::FromMilliseconds(200),

[Avi (use Gerrit), 2014/02/14 02:11:29]

... you say 200ms here.

[ccameron, 2014/02/14 02:32:19]

Changed to 250

+            this, &RenderWidgetHostViewMac::TimerSinceGotAcceleratedFrameFired),
       allow_overlapping_views_(false),
       use_core_animation_(false),
       pending_latency_info_delay_(0),
@@ -1405,7 +1408,8 @@ void RenderWidgetHostViewMac::CompositorSwapBuffers(
   if (!about_to_validate_and_paint_) {
     if (use_core_animation_) {
       DCHECK(compositing_iosurface_layer_);
-      [compositing_iosurface_layer_ setNeedsDisplay];
+      compositing_iosurface_layer_async_timer_.Reset();
+      [compositing_iosurface_layer_ gotNewFrame];
     } else {
       if (!DrawIOSurfaceWithoutCoreAnimation()) {
         [cocoa_view_ setNeedsDisplay:YES];
@@ -1903,6 +1907,10 @@ void RenderWidgetHostViewMac::GotSoftwareFrame() {
   }
 }
 
+void RenderWidgetHostViewMac::TimerSinceGotAcceleratedFrameFired() {
+  [compositing_iosurface_layer_ timerSinceGotNewFrameFired];
+}
+
 void RenderWidgetHostViewMac::SetActive(bool active) {
   if (render_widget_host_) {
     render_widget_host_->SetActive(active);