Change cc::ElementId to be a uint64_t

ui/compositor/layer.cc

 // Copyright (c) 2012 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 "ui/compositor/layer.h"
 
 #include <algorithm>
 #include <memory>
 #include <utility>
 
@@ skipping 599 matching lines @@
 
   for (size_t i = 0; i < children_.size(); ++i) {
     DCHECK(children_[i]->cc_layer_);
     cc_layer_->AddChild(children_[i]->cc_layer_);
   }
   cc_layer_->SetLayerClient(this);
   cc_layer_->SetTransformOrigin(gfx::Point3F());
   cc_layer_->SetContentsOpaque(fills_bounds_opaquely_);
   cc_layer_->SetIsDrawable(type_ != LAYER_NOT_DRAWN);
   cc_layer_->SetHideLayerAndSubtree(!visible_);
-  cc_layer_->SetElementId(cc::ElementId(cc_layer_->id(), 0));
+  cc_layer_->SetElementId(cc::ElementId(cc_layer_->id()));
 
   SetLayerFilters();
   SetLayerBackgroundFilters();
 }
 
 void Layer::SwitchCCLayerForTest() {
   scoped_refptr<cc::Layer> new_layer = cc::PictureLayer::Create(this);
   SwitchToLayer(new_layer);
   content_layer_ = new_layer;
 }
@@ skipping 529 matching lines @@
     nine_patch_layer_ = cc::NinePatchLayer::Create();
     cc_layer_ = nine_patch_layer_.get();
   } else {
     content_layer_ = cc::PictureLayer::Create(this);
     cc_layer_ = content_layer_.get();
   }
   cc_layer_->SetTransformOrigin(gfx::Point3F());
   cc_layer_->SetContentsOpaque(true);
   cc_layer_->SetIsDrawable(type_ != LAYER_NOT_DRAWN);
   cc_layer_->SetLayerClient(this);
-  cc_layer_->SetElementId(cc::ElementId(cc_layer_->id(), 0));
+  cc_layer_->SetElementId(cc::ElementId(cc_layer_->id()));
   RecomputePosition();
 }
 
 gfx::Transform Layer::transform() const {
   return cc_layer_->transform();
 }
 
 void Layer::RecomputeDrawsContentAndUVRect() {
   DCHECK(cc_layer_);
   gfx::Size size(bounds_.size());
@@ skipping 46 matching lines @@
   const auto it = std::find_if(mirrors_.begin(), mirrors_.end(),
       [mirror](const std::unique_ptr<LayerMirror>& mirror_ptr) {
         return mirror_ptr.get() == mirror;
       });
 
   DCHECK(it != mirrors_.end());
   mirrors_.erase(it);
 }
 
 }  // namespace ui