Aura: Resize locks with --ui-enable-threaded-compositing

We temporarily defer commits while resizing so that the renderer has a chance to catch up with the UI window size.

Noteable changes from master:
- RWHVs can fast ACK the GPU process (not flip in the browser or TextureImageTransportSurface); useful for allowing the renderer to catch up when it gets too far behind.
- RWHVA will insist kicking a renderer frame after the lock times out on resize (wasn't necessary before)
- ui::Compositor vends draw locks (which largely just wraps to cc::Proxy) of ui::aura::RootWindow

BUG=136366
TEST=None

Review URL: https://chromiumcodereview.appspot.com/10690168

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@164460 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 6 insertions, 0 deletions

diff --git a/webkit/compositor_bindings/web_layer_tree_view_impl.cc b/webkit/compositor_bindings/web_layer_tree_view_impl.cc
index e61a166..d1a453e 100644
--- a/webkit/compositor_bindings/web_layer_tree_view_impl.cc
+++ b/webkit/compositor_bindings/web_layer_tree_view_impl.cc
@@ -165,6 +165,11 @@ void WebLayerTreeViewImpl::finishAllRendering()
     m_layerTreeHost->finishAllRendering();
 }
 
+void WebLayerTreeViewImpl::setDeferCommits(bool deferCommits)
+{
+    m_layerTreeHost->setDeferCommits(deferCommits);
+}
+
 void WebLayerTreeViewImpl::renderingStats(WebRenderingStats& stats) const
 {
     RenderingStats ccStats;
diff --git a/webkit/compositor_bindings/web_layer_tree_view_impl.h b/webkit/compositor_bindings/web_layer_tree_view_impl.h
index 9b0ecbf..dace36c 100644
--- a/webkit/compositor_bindings/web_layer_tree_view_impl.h
+++ b/webkit/compositor_bindings/web_layer_tree_view_impl.h
@@ -46,6 +46,7 @@ public:
     virtual void updateAnimations(double frameBeginTime) OVERRIDE;
     virtual bool compositeAndReadback(void *pixels, const WebRect&) OVERRIDE;
     virtual void finishAllRendering() OVERRIDE;
+    virtual void setDeferCommits(bool deferCommits) OVERRIDE;
     virtual void renderingStats(WebRenderingStats&) const OVERRIDE;
     virtual void setFontAtlas(SkBitmap, WebRect asciiToRectTable[128], int fontHeight) OVERRIDE;
     virtual void loseCompositorContext(int numTimes) OVERRIDE;