cc: Check for completed raster tasks at interval.

cc/layer_tree_host_impl.cc

Index: cc/layer_tree_host_impl.cc
diff --git a/cc/layer_tree_host_impl.cc b/cc/layer_tree_host_impl.cc
index e357999dcb264deb268a5c190e8f2662127359c6..716937a7469a973295c1f47010a7ce4e7355e970 100644
--- a/cc/layer_tree_host_impl.cc
+++ b/cc/layer_tree_host_impl.cc
@@ -720,12 +720,24 @@ void LayerTreeHostImpl::ScheduleManageTiles()
       m_client->setNeedsManageTilesOnImplThread();
 }
 
+void LayerTreeHostImpl::ScheduleCheckForCompletedRasterTasks()
+{
+    if (m_client)
+        m_client->setNeedsCheckForCompletedRasterTasksOnImplThread();
+}
+
 void LayerTreeHostImpl::DidUploadVisibleHighResolutionTile()
 {
     if (m_client)
         m_client->didUploadVisibleHighResolutionTileOnImplThread();
 }
 
+void LayerTreeHostImpl::DidDetectIdleRaster()
+{
+    if (m_client)
+        m_client->didDetectIdleRasterOnImplThread();
+}
+
 bool LayerTreeHostImpl::shouldClearRootRenderPass() const
 {
     return m_settings.shouldClearRootRenderPass;
@@ -1724,6 +1736,14 @@ scoped_ptr<base::Value> LayerTreeHostImpl::frameStateAsValue() const
     return state.PassAs<base::Value>();
 }
 
+void LayerTreeHostImpl::checkForCompletedRasterTasks()
+{
+    if (!m_tileManager)
+        return;
+
+    m_tileManager->CheckForCompletedRasterTasks();
+}
+
 // static
 LayerImpl* LayerTreeHostImpl::getNonCompositedContentLayerRecursive(LayerImpl* layer)
 {