cc: Set up the framework to restrict access to Layer internals.

cc/test/fake_picture_layer.cc

 // Copyright 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 "cc/test/fake_picture_layer.h"
 
 #include "cc/test/fake_picture_layer_impl.h"
 
 namespace cc {
 
@@ skipping 14 matching lines @@
       always_update_resources_(false) {
   SetBounds(gfx::Size(1, 1));
   SetIsDrawable(true);
 }
 
 FakePictureLayer::~FakePictureLayer() {}
 
 std::unique_ptr<LayerImpl> FakePictureLayer::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
   if (is_mask())
-    return FakePictureLayerImpl::CreateMask(tree_impl, layer_id_);
-  return FakePictureLayerImpl::Create(tree_impl, layer_id_);
+    return FakePictureLayerImpl::CreateMask(tree_impl, id());
+  return FakePictureLayerImpl::Create(tree_impl, id());
 }
 
 bool FakePictureLayer::Update() {
   bool updated = PictureLayer::Update();
   update_count_++;
   return updated || always_update_resources_;
 }
 
 void FakePictureLayer::PushPropertiesTo(LayerImpl* layer) {
   PictureLayer::PushPropertiesTo(layer);
   push_properties_count_++;
 }
 
 }  // namespace cc