Change cc::ElementId to be a uint64_t

cc/layers/layer.cc

 // Copyright 2010 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/layers/layer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 41 matching lines @@
       should_flatten_transform(true),
       sorting_context_id(0),
       use_parent_backface_visibility(false),
       background_color(0),
       scroll_clip_layer_id(INVALID_ID),
       user_scrollable_horizontal(true),
       user_scrollable_vertical(true),
       main_thread_scrolling_reasons(
           MainThreadScrollingReason::kNotScrollingOnMain),
       is_container_for_fixed_position_layers(false),
+      element_id(kInvalidElementId),
       mutable_properties(MutableProperty::kNone),
       scroll_parent(nullptr),
       clip_parent(nullptr),
       has_will_change_transform_hint(false),
       hide_layer_and_subtree(false),
       client(nullptr) {}
 
 Layer::Inputs::~Inputs() {}
 
 scoped_refptr<Layer> Layer::Create() {
@@ skipping 1348 matching lines @@
 
 void Layer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 void Layer::SetElementId(ElementId id) {
   DCHECK(IsPropertyChangeAllowed());
   if (inputs_.element_id == id)
     return;
   TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("compositor-worker"),
-               "Layer::SetElementId", "element", id.AsValue().release());
+               "Layer::SetElementId", "element", id);
   if (inputs_.element_id && layer_tree_host()) {
     layer_tree_host_->UnregisterElement(inputs_.element_id,
                                         ElementListType::ACTIVE, this);
   }
 
   inputs_.element_id = id;
 
   if (inputs_.element_id && layer_tree_host()) {
     layer_tree_host_->RegisterElement(inputs_.element_id,
                                       ElementListType::ACTIVE, this);
@@ skipping 18 matching lines @@
       ->subtree_has_copy_request;
 }
 
 gfx::Transform Layer::ScreenSpaceTransform() const {
   DCHECK_NE(transform_tree_index_, TransformTree::kInvalidNodeId);
   return draw_property_utils::ScreenSpaceTransform(
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 }  // namespace cc