cc: Cancel RenewTreePriorirty callback if LTHI is gone.

cc/trees/thread_proxy.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/thread_proxy.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 1236 matching lines @@
   TRACE_EVENT0("cc", "ThreadProxy::LayerTreeHostClosedOnImplThread");
   DCHECK(IsImplThread());
   DCHECK(IsMainThreadBlocked());
   layer_tree_host()->DeleteContentsTexturesOnImplThread(
       impl().layer_tree_host_impl->resource_provider());
   impl().current_resource_update_controller.reset();
   impl().layer_tree_host_impl->SetNeedsBeginFrame(false);
   impl().scheduler.reset();
   impl().layer_tree_host_impl.reset();
   impl().weak_factory.InvalidateWeakPtrs();
+  impl().smoothness_priority_expiration_notifier.Cancel();

[danakj, 2014/09/08 17:33:13]

Leave a comment saying that this isn't using WeakPtr and why? (or todo if you
think it should be using that)

[vmpstr, 2014/09/08 17:42:35]

Done. Also, I filed a bug with reveman@'s suggestion and mentioned it in the
comment as a (possibly better) alternative to fix this.

   impl().contents_texture_manager = NULL;
   completion->Signal();
 }
 
 size_t ThreadProxy::MaxPartialTextureUpdates() const {
   return ResourceUpdateController::MaxPartialTextureUpdates();
 }
 
 ThreadProxy::BeginMainFrameAndCommitState::BeginMainFrameAndCommitState()
     : memory_allocation_limit_bytes(0),
@@ skipping 123 matching lines @@
 
   impl().timing_history.DidActivateSyncTree();
 }
 
 void ThreadProxy::DidManageTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidManageTiles();
 }
 
 }  // namespace cc