cc : Delete layer's draw blend mode

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 <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 76 matching lines @@
       should_flatten_transform_from_property_tree_(false),
       draws_content_(false),
       use_local_transform_for_backface_visibility_(false),
       should_check_backface_visibility_(false),
       force_render_surface_for_testing_(false),
       subtree_property_changed_(false),
       may_contain_video_(false),
       is_scroll_clip_layer_(false),
       needs_show_scrollbars_(false),
       safe_opaque_background_color_(0),
-      draw_blend_mode_(SkBlendMode::kSrcOver),
       num_unclipped_descendants_(0) {}
 
 Layer::~Layer() {
   // Our parent should be holding a reference to us so there should be no
   // way for us to be destroyed while we still have a parent.
   DCHECK(!parent());
   // Similarly we shouldn't have a layer tree host since it also keeps a
   // reference to us.
   DCHECK(!layer_tree_host());
 
@@ skipping 1048 matching lines @@
   layer->set_may_contain_video(may_contain_video_);
   layer->SetMasksToBounds(inputs_.masks_to_bounds);
   layer->set_main_thread_scrolling_reasons(
       inputs_.main_thread_scrolling_reasons);
   layer->SetNonFastScrollableRegion(inputs_.non_fast_scrollable_region);
   layer->SetTouchEventHandlerRegion(inputs_.touch_event_handler_region);
   layer->SetContentsOpaque(inputs_.contents_opaque);
   layer->SetPosition(inputs_.position);
   layer->set_should_flatten_transform_from_property_tree(
       should_flatten_transform_from_property_tree_);
-  layer->set_draw_blend_mode(draw_blend_mode_);
   layer->SetUseParentBackfaceVisibility(inputs_.use_parent_backface_visibility);
   layer->SetUseLocalTransformForBackfaceVisibility(
       use_local_transform_for_backface_visibility_);
   layer->SetShouldCheckBackfaceVisibility(should_check_backface_visibility_);
 
   layer->SetScrollClipLayer(inputs_.scroll_clip_layer_id);
   layer->set_user_scrollable_horizontal(inputs_.user_scrollable_horizontal);
   layer->set_user_scrollable_vertical(inputs_.user_scrollable_vertical);
   layer->SetElementId(inputs_.element_id);
   layer->SetMutableProperties(inputs_.mutable_properties);
@@ skipping 268 matching lines @@
       ->num_copy_requests_in_subtree;
 }
 
 gfx::Transform Layer::screen_space_transform() const {
   DCHECK_NE(transform_tree_index_, TransformTree::kInvalidNodeId);
   return draw_property_utils::ScreenSpaceTransform(
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 }  // namespace cc