cc: Make LayerTreeImpl dump layer list to FrameViewer and Devtools

cc/layers/layer_impl.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/layers/layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1228 matching lines @@
   if (!touch_event_handler_region_.IsEmpty()) {
     state->BeginArray("touch_event_handler_region");
     touch_event_handler_region_.AsValueInto(state);
     state->EndArray();
   }
   if (!non_fast_scrollable_region_.IsEmpty()) {
     state->BeginArray("non_fast_scrollable_region");
     non_fast_scrollable_region_.AsValueInto(state);
     state->EndArray();
   }
-  state->BeginArray("children");
-  for (size_t i = 0; i < children_.size(); ++i) {
-    state->BeginDictionary();
-    children_[i]->AsValueInto(state);
-    state->EndDictionary();
-  }
-  state->EndArray();
   if (mask_layer_) {
     state->BeginDictionary("mask_layer");
     mask_layer_->AsValueInto(state);
     state->EndDictionary();
   }
   if (replica_layer_) {
     state->BeginDictionary("replica_layer");
     replica_layer_->AsValueInto(state);
     state->EndDictionary();
   }
@@ skipping 144 matching lines @@
            .layer_transforms_should_scale_layer_contents) {
     return default_scale;
   }
 
   gfx::Vector2dF transform_scales = MathUtil::ComputeTransform2dScaleComponents(
       DrawTransform(), default_scale);
   return std::max(transform_scales.x(), transform_scales.y());
 }
 
 }  // namespace cc