Remove offscreen compositor contexts.

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/debug/trace_event.h"
 #include "base/location.h"
@@ skipping 115 matching lines @@
   if (host) {
     layer_animation_controller_->SetAnimationRegistrar(
         host->animation_registrar());
 
     if (host->settings().layer_transforms_should_scale_layer_contents)
       reset_raster_scale_to_unknown();
   }
 
   if (host && layer_animation_controller_->has_any_animation())
     host->SetNeedsCommit();
-  SetNeedsFilterContextIfNeeded();
 }
 
 void Layer::SetNeedsUpdate() {
   if (layer_tree_host_ && !ignore_set_needs_commit_)
     layer_tree_host_->SetNeedsUpdateLayers();
 }
 
 void Layer::SetNeedsCommit() {
   if (!layer_tree_host_)
     return;
@@ skipping 13 matching lines @@
   layer_tree_host_->SetNeedsFullTreeSync();
 }
 
 void Layer::SetNextCommitWaitsForActivation() {
   if (!layer_tree_host_)
     return;
 
   layer_tree_host_->SetNextCommitWaitsForActivation();
 }
 
-void Layer::SetNeedsFilterContextIfNeeded() {
-  if (!layer_tree_host_)
-    return;
-
-  if (!filters_.IsEmpty() || !background_filters_.IsEmpty() ||
-      !uses_default_blend_mode())
-    layer_tree_host_->set_needs_filter_context();
-}
-
 void Layer::SetNeedsPushProperties() {
   if (needs_push_properties_)
     return;
   if (!parent_should_know_need_push_properties() && parent_)
     parent_->AddDependentNeedsPushProperties();
   needs_push_properties_ = true;
 }
 
 void Layer::AddDependentNeedsPushProperties() {
   DCHECK_GE(num_dependents_need_push_properties_, 0);
@@ skipping 291 matching lines @@
   }
   SetNeedsFullTreeSync();
 }
 
 void Layer::SetFilters(const FilterOperations& filters) {
   DCHECK(IsPropertyChangeAllowed());
   if (filters_ == filters)
     return;
   filters_ = filters;
   SetNeedsCommit();
-  SetNeedsFilterContextIfNeeded();
 }
 
 bool Layer::FilterIsAnimating() const {
   return layer_animation_controller_->IsAnimatingProperty(Animation::Filter);
 }
 
 void Layer::SetBackgroundFilters(const FilterOperations& filters) {
   DCHECK(IsPropertyChangeAllowed());
   if (background_filters_ == filters)
     return;
   background_filters_ = filters;
   SetNeedsCommit();
-  SetNeedsFilterContextIfNeeded();
 }
 
 void Layer::SetOpacity(float opacity) {
   DCHECK(IsPropertyChangeAllowed());
   if (opacity_ == opacity)
     return;
   opacity_ = opacity;
   SetNeedsCommit();
 }
 
@@ skipping 45 matching lines @@
     case SkXfermode::kPlus_Mode:
     case SkXfermode::kModulate_Mode:
       // Porter Duff Compositing Operators are not yet supported
       // http://dev.w3.org/fxtf/compositing-1/#porterduffcompositingoperators
       NOTREACHED();
       return;
   }
 
   blend_mode_ = blend_mode;
   SetNeedsCommit();
-  SetNeedsFilterContextIfNeeded();
 }
 
 void Layer::SetIsRootForIsolatedGroup(bool root) {
   DCHECK(IsPropertyChangeAllowed());
   if (is_root_for_isolated_group_ == root)
     return;
   is_root_for_isolated_group_ = root;
   SetNeedsCommit();
 }
 
@@ skipping 612 matching lines @@
   if (clip_parent_)
     clip_parent_->RemoveClipChild(this);
 
   clip_parent_ = NULL;
 }
 
 void Layer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 }  // namespace cc