cc: Fix hit-testing in zero-opacity layers.

cc/trees/occlusion_tracker.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/trees/occlusion_tracker.h"
 
 #include <algorithm>
 
 #include "cc/base/math_util.h"
 #include "cc/debug/overdraw_metrics.h"
@@ skipping 390 matching lines @@
 }
 
 template <typename LayerType, typename RenderSurfaceType>
 void OcclusionTrackerBase<LayerType, RenderSurfaceType>::
     MarkOccludedBehindLayer(const LayerType* layer) {
   DCHECK(!stack_.empty());
   DCHECK_EQ(layer->render_target(), stack_.back().target);
   if (stack_.empty())
     return;
 
-  if (!layer->DrawsContent())
+  if (layer->draw_properties().skip_drawing)
     return;
 
   if (!LayerOpacityKnown(layer) || layer->draw_opacity() < 1)
     return;
 
   if (LayerIsInUnsorted3dRenderingContext(layer))
     return;
 
   if (!LayerTransformsToTargetKnown(layer))
     return;
@@ skipping 256 matching lines @@
   unoccluded_rect.Intersect(content_rect);
 
   return unoccluded_rect;
 }
 
 // Instantiate (and export) templates here for the linker.
 template class OcclusionTrackerBase<Layer, RenderSurface>;
 template class OcclusionTrackerBase<LayerImpl, RenderSurfaceImpl>;
 
 }  // namespace cc