cc: Add frame data to LTHI tracing

cc/trees/layer_tree_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_impl.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/animation/keyframed_animation_curve.h"
 #include "cc/animation/scrollbar_animation_controller.h"
 #include "cc/debug/traced_value.h"
@@ skipping 22 matching lines @@
       min_page_scale_factor_(0),
       max_page_scale_factor_(0),
       scrolling_layer_id_from_previous_tree_(0),
       contents_textures_purged_(false),
       viewport_size_invalid_(false),
       needs_update_draw_properties_(true),
       needs_full_tree_sync_(true) {
 }
 
 LayerTreeImpl::~LayerTreeImpl() {
+  TRACE_EVENT_OBJECT_DELETED_WITH_ID(
+      TRACE_DISABLED_BY_DEFAULT("cc.debug"), "cc::LayerTreeImpl", this);
   // Need to explicitly clear the tree prior to destroying this so that
   // the LayerTreeImpl pointer is still valid in the LayerImpl dtor.
   root_layer_.reset();
 }
 
 static LayerImpl* FindRootScrollLayerRecursive(LayerImpl* layer) {
   if (!layer)
     return NULL;
 
   if (layer->scrollable())
@@ skipping 449 matching lines @@
   return layer_tree_host_impl_->debug_rect_history();
 }
 
 AnimationRegistrar* LayerTreeImpl::animationRegistrar() const {
   return layer_tree_host_impl_->animation_registrar();
 }
 
 scoped_ptr<base::Value> LayerTreeImpl::AsValue() const {
   scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue());
   TracedValue::MakeDictIntoImplicitSnapshot(
-      state.get(), "cc::LayerTreeImpl", this);
+      TRACE_DISABLED_BY_DEFAULT("cc.debug"), state.get(), "cc::LayerTreeImpl",
+      this);
 
   state->Set("root_layer", root_layer_->AsValue().release());
 
   scoped_ptr<base::ListValue> render_surface_layer_list(new base::ListValue());
   typedef LayerIterator<LayerImpl,
                         LayerImplList,
                         RenderSurfaceImpl,
                         LayerIteratorActions::BackToFront> LayerIteratorType;
   LayerIteratorType end = LayerIteratorType::End(&render_surface_layer_list_);
   for (LayerIteratorType it = LayerIteratorType::Begin(
@@ skipping 108 matching lines @@
 const std::vector<LayerImpl*> LayerTreeImpl::LayersWithCopyOutputRequest()
     const {
   // Only the active tree needs to know about layers with copy requests, as
   // they are aborted if not serviced during draw.
   DCHECK(IsActiveTree());
 
   return layers_with_copy_output_request_;
 }
 
 }  // namespace cc