Revert of Remove blink::WebLayerClient and WebGraphicsLayerDebugInfo.

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 <algorithm>
 
 #include "base/atomic_sequence_num.h"
 #include "base/location.h"
@@ skipping 1513 matching lines @@
   return false;
 }
 
 bool Layer::IsSuitableForGpuRasterization() const {
   return true;
 }
 
 scoped_refptr<base::trace_event::ConvertableToTraceFormat>
 Layer::TakeDebugInfo() {
   if (client_)
-    return client_->TakeDebugInfo(this);
+    return client_->TakeDebugInfo();
   else
     return nullptr;
 }
 
 void Layer::SetHasRenderSurface(bool has_render_surface) {
   if (has_render_surface_ == has_render_surface)
     return;
   has_render_surface_ = has_render_surface;
   // We do not need SetNeedsCommit here, since this is only ever called
   // during a commit, from CalculateDrawProperties.
@@ skipping 281 matching lines @@
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 gfx::Transform Layer::screen_space_transform() const {
   DCHECK_NE(transform_tree_index_, -1);
   return ScreenSpaceTransformFromPropertyTrees(
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 }  // namespace cc