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 607a50c2344ce9bc1810702f5238d2507b535de4..96a0908d218ed8e1415e5d49f6842fa2c2fc7bf1 100644
--- a/cc/layer_tree_host_impl.cc
+++ b/cc/layer_tree_host_impl.cc
@@ -709,6 +709,12 @@ void LayerTreeHostImpl::ScheduleManageTiles()
       m_client->setNeedsManageTilesOnImplThread();
 }
 
+void LayerTreeHostImpl::ScheduleCheckForCompletedRasterTasks()
+{
+    if (m_client)
+        m_client->setNeedsCheckForCompletedRasterTasksOnImplThread();
+}
+
 void LayerTreeHostImpl::DidUploadVisibleHighResolutionTile()
 {
     if (m_client)
@@ -1695,6 +1701,14 @@ base::TimeTicks LayerTreeHostImpl::currentFrameTime()
     return m_currentFrameTime;
 }
 
+void LayerTreeHostImpl::checkForCompletedRasterTasks()
+{
+    if (!m_tileManager)
+        return;
+
+    m_tileManager->CheckForCompletedRasterTasks();
+}
+
 // static
 LayerImpl* LayerTreeHostImpl::getNonCompositedContentLayerRecursive(LayerImpl* layer)
 {