Added methods to generate sync tokens for resource id(s).

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 <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 3630 matching lines @@
   UIResourceData data;
   data.resource_id = id;
   data.size = bitmap.GetSize();
   data.opaque = bitmap.GetOpaque();
 
   ui_resource_map_[uid] = data;
 
   AutoLockUIResourceBitmap bitmap_lock(bitmap);
   resource_provider_->CopyToResource(id, bitmap_lock.GetPixels(),
                                      bitmap.GetSize());
+
+  resource_provider_->GenerateSyncTokenForResource(id);
   MarkUIResourceNotEvicted(uid);
 }
 
 void LayerTreeHostImpl::DeleteUIResource(UIResourceId uid) {
   ResourceId id = ResourceIdForUIResource(uid);
   if (id) {
     resource_provider_->DeleteResource(id);
     ui_resource_map_.erase(uid);
   }
   MarkUIResourceNotEvicted(uid);
@@ skipping 310 matching lines @@
   return task_runner_provider_->HasImplThread();
 }
 
 bool LayerTreeHostImpl::CommitToActiveTree() const {
   // In single threaded mode we skip the pending tree and commit directly to the
   // active tree.
   return !task_runner_provider_->HasImplThread();
 }
 
 }  // namespace cc