cc: Move blend_mode to the effect tree

cc/layers/layer_impl.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/layers/layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 51 matching lines @@
       masks_to_bounds_(false),
       contents_opaque_(false),
       use_parent_backface_visibility_(false),
       use_local_transform_for_backface_visibility_(false),
       should_check_backface_visibility_(false),
       draws_content_(false),
       is_drawn_render_surface_layer_list_member_(false),
       was_ever_ready_since_last_transform_animation_(true),
       background_color_(0),
       safe_opaque_background_color_(0),
-      blend_mode_(SkXfermode::kSrcOver_Mode),
       draw_blend_mode_(SkXfermode::kSrcOver_Mode),
       transform_tree_index_(-1),
       effect_tree_index_(-1),
       clip_tree_index_(-1),
       scroll_tree_index_(-1),
       sorting_context_id_(0),
       current_draw_mode_(DRAW_MODE_NONE),
       mutable_properties_(MutableProperty::kNone),
       debug_info_(nullptr),
       scrolls_drawn_descendant_(false),
@@ skipping 260 matching lines @@
   layer->contents_opaque_ = contents_opaque_;
   layer->use_parent_backface_visibility_ = use_parent_backface_visibility_;
   layer->use_local_transform_for_backface_visibility_ =
       use_local_transform_for_backface_visibility_;
   layer->should_check_backface_visibility_ = should_check_backface_visibility_;
   layer->draws_content_ = draws_content_;
   layer->non_fast_scrollable_region_ = non_fast_scrollable_region_;
   layer->touch_event_handler_region_ = touch_event_handler_region_;
   layer->background_color_ = background_color_;
   layer->safe_opaque_background_color_ = safe_opaque_background_color_;
-  layer->blend_mode_ = blend_mode_;
   layer->draw_blend_mode_ = draw_blend_mode_;
   layer->position_ = position_;
   layer->transform_ = transform_;
   layer->transform_tree_index_ = transform_tree_index_;
   layer->effect_tree_index_ = effect_tree_index_;
   layer->clip_tree_index_ = clip_tree_index_;
   layer->scroll_tree_index_ = scroll_tree_index_;
   layer->sorting_context_id_ = sorting_context_id_;
   layer->has_will_change_transform_hint_ = has_will_change_transform_hint_;
 
@@ skipping 491 matching lines @@
     return;
 
   TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("compositor-worker"),
                "LayerImpl::SetMutableProperties", "properties", properties);
 
   mutable_properties_ = properties;
   // If this layer is already in the element map, update its properties.
   layer_tree_impl_->AddToElementMap(this);
 }
 
-void LayerImpl::SetBlendMode(SkXfermode::Mode blend_mode) {
-  blend_mode_ = blend_mode;
-}
-
 void LayerImpl::SetPosition(const gfx::PointF& position) {
   position_ = position;
 }
 
 void LayerImpl::Set3dSortingContextId(int id) {
   sorting_context_id_ = id;
 }
 
 void LayerImpl::SetTransform(const gfx::Transform& transform) {
   transform_ = transform;
@@ skipping 334 matching lines @@
            .layer_transforms_should_scale_layer_contents) {
     return default_scale;
   }
 
   gfx::Vector2dF transform_scales = MathUtil::ComputeTransform2dScaleComponents(
       ScreenSpaceTransform(), default_scale);
   return std::max(transform_scales.x(), transform_scales.y());
 }
 
 }  // namespace cc