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

cc/trees/layer_tree_impl.cc

 // Copyright 2011 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/layer_tree_impl.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/animation/keyframed_animation_curve.h"
 #include "cc/animation/scrollbar_animation_controller.h"
 #include "cc/debug/traced_value.h"
@@ skipping 324 matching lines @@
     vertical->SetVisibleToTotalLengthRatio(
         scrollable_viewport.height() / ScrollableSize().height());
   }
 }
 
 void LayerTreeImpl::UpdateDrawProperties() {
   if (IsActiveTree() && RootScrollLayer() && RootContainerLayer())
     UpdateRootScrollLayerSizeDelta();
 
   if (IsActiveTree() &&
-      RootContainerLayer()
-      && !RootContainerLayer()->masks_to_bounds()) {
+      RootContainerLayer() &&
+      !RootContainerLayer()->masks_to_bounds()) {
     UpdateSolidColorScrollbars();
   }
 
   needs_update_draw_properties_ = false;
   render_surface_layer_list_.clear();
 
   // For max_texture_size.
   if (!layer_tree_host_impl_->renderer())
     return;
 
@@ skipping 41 matching lines @@
                           RenderSurfaceImpl,
                           LayerIteratorActions::FrontToBack> LayerIteratorType;
     LayerIteratorType end = LayerIteratorType::End(&render_surface_layer_list_);
     for (LayerIteratorType it =
              LayerIteratorType::Begin(&render_surface_layer_list_);
          it != end;
          ++it) {
       if (!it.represents_itself())
         continue;
       LayerImpl* layer = *it;
+      if (layer->draw_properties().skip_drawing)
+        continue;
 
       layer->UpdateTilePriorities();
       if (layer->mask_layer())
         layer->mask_layer()->UpdateTilePriorities();
       if (layer->replica_layer() && layer->replica_layer()->mask_layer())
         layer->replica_layer()->mask_layer()->UpdateTilePriorities();
     }
   }
 
   DCHECK(!needs_update_draw_properties_) <<
@@ skipping 347 matching lines @@
 const std::vector<LayerImpl*> LayerTreeImpl::LayersWithCopyOutputRequest()
     const {
   // Only the active tree needs to know about layers with copy requests, as
   // they are aborted if not serviced during draw.
   DCHECK(IsActiveTree());
 
   return layers_with_copy_output_request_;
 }
 
 }  // namespace cc