NotifyAllTileTasksCompleted for synchronous renderer compositor

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <set>
@@ skipping 1331 matching lines @@
 void LayerTreeHostImpl::SetMemoryPolicy(const ManagedMemoryPolicy& policy) {
   SetManagedMemoryPolicy(policy);
 
   // This is short term solution to synchronously drop tile resources when
   // using synchronous compositing to avoid memory usage regression.
   // TODO(boliu): crbug.com/499004 to track removing this.
   if (!policy.bytes_limit_when_visible && resource_pool_ &&
       settings_.using_synchronous_renderer_compositor) {
     ReleaseTreeResources();
     CleanUpTileManager();
+
+    // Force a call to NotifyAllTileTasks completed - otherwise this logic may
+    // be skipped if no work was enqueued at the time the tile manager was
+    // destroyed.
+    NotifyAllTileTasksCompleted();
+
     CreateTileManagerResources();
     RecreateTreeResources();
   }
 }
 
 void LayerTreeHostImpl::SetTreeActivationCallback(
     const base::Closure& callback) {
   DCHECK(proxy_->IsImplThread());
   tree_activation_callback_ = callback;
 }
@@ skipping 2245 matching lines @@
   if (active_tree()) {
     LayerAnimationValueProvider* layer = active_tree()->LayerById(layer_id);
     if (layer)
       return layer->ScrollOffsetForAnimation();
   }
 
   return gfx::ScrollOffset();
 }
 
 }  // namespace cc