cc : Delete target id and content target id from transform nodes

cc/trees/transform_node.cc

 // Copyright 2016 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 "base/trace_event/trace_event_argument.h"
 #include "cc/base/math_util.h"
 #include "cc/layers/layer.h"
 #include "cc/trees/property_tree.h"
 #include "cc/trees/transform_node.h"
 #include "ui/gfx/geometry/point3_f.h"
@@ skipping 90 matching lines @@
       transform_origin.z());
 }
 
 void TransformNode::AsValueInto(base::trace_event::TracedValue* value) const {
   value->SetInteger("id", id);
   value->SetInteger("parent_id", parent_id);
   value->SetInteger("owning_layer_id", owning_layer_id);
   MathUtil::AddToTracedValue("pre_local", pre_local, value);
   MathUtil::AddToTracedValue("local", local, value);
   MathUtil::AddToTracedValue("post_local", post_local, value);
-  // TODO(sunxd): make frameviewer work without target_id
-  value->SetInteger("target_id", 0);
-  value->SetInteger("content_target_id", 0);
   value->SetInteger("source_node_id", source_node_id);
   value->SetInteger("sorting_context_id", sorting_context_id);
   MathUtil::AddToTracedValue("scroll_offset", scroll_offset, value);
   MathUtil::AddToTracedValue("snap_amount", snap_amount, value);
 }
 
 TransformCachedNodeData::TransformCachedNodeData()
-    : target_id(-1), content_target_id(-1), is_showing_backface(false) {}
+    : is_showing_backface(false) {}
 
 TransformCachedNodeData::TransformCachedNodeData(
     const TransformCachedNodeData& other) = default;
 
 TransformCachedNodeData::~TransformCachedNodeData() {}
 
 bool TransformCachedNodeData::operator==(
     const TransformCachedNodeData& other) const {
   return from_screen == other.from_screen && to_screen == other.to_screen &&
-         target_id == other.target_id &&
-         content_target_id == other.content_target_id &&
          is_showing_backface == other.is_showing_backface;
 }
 
 }  // namespace cc