HUD: Show first paint invalidation in red

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/debug/trace_event.h"
@@ skipping 852 matching lines @@
   layer->SetBounds(use_paint_properties ? paint_properties_.bounds
                                         : bounds_);
   layer->SetContentBounds(content_bounds());
   layer->SetContentsScale(contents_scale_x(), contents_scale_y());
 
   bool is_tracing;
   TRACE_EVENT_CATEGORY_GROUP_ENABLED(
       TRACE_DISABLED_BY_DEFAULT("cc.debug") "," TRACE_DISABLED_BY_DEFAULT(
           "devtools.timeline.layers"),
       &is_tracing);
+
   if (is_tracing)
     layer->SetDebugInfo(TakeDebugInfo());
 
   layer->SetDoubleSided(double_sided_);
   layer->SetDrawCheckerboardForMissingTiles(
       draw_checkerboard_for_missing_tiles_);
   layer->SetForceRenderSurface(force_render_surface_);
   layer->SetDrawsContent(DrawsContent());
   layer->SetHideLayerAndSubtree(hide_layer_and_subtree_);
   if (!layer->FilterIsAnimatingOnImplOnly() && !FilterIsAnimating())
@@ skipping 181 matching lines @@
 }
 
 bool Layer::NeedMoreUpdates() {
   return false;
 }
 
 bool Layer::IsSuitableForGpuRasterization() const {
   return true;
 }
 
-scoped_refptr<base::debug::ConvertableToTraceFormat> Layer::TakeDebugInfo() {
+scoped_refptr<LayerDebugInfo> Layer::TakeDebugInfo() {
   if (client_)
     return client_->TakeDebugInfo();
   else
     return NULL;
 }
 
 void Layer::CreateRenderSurface() {
   DCHECK(!draw_properties_.render_surface);
   draw_properties_.render_surface = make_scoped_ptr(new RenderSurface(this));
   draw_properties_.render_target = this;
@@ skipping 152 matching lines @@
 
 void Layer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 bool Layer::HasDelegatedContent() const {
   return false;
 }
 
 }  // namespace cc