Purge the ScrollBlocksOn code.

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 70 matching lines @@
       draws_content_(false),
       hide_layer_and_subtree_(false),
       masks_to_bounds_(false),
       contents_opaque_(false),
       double_sided_(true),
       should_flatten_transform_(true),
       use_parent_backface_visibility_(false),
       force_render_surface_(false),
       transform_is_invertible_(true),
       has_render_surface_(false),
-      scroll_blocks_on_(SCROLL_BLOCKS_ON_NONE),
       background_color_(0),
       opacity_(1.f),
       blend_mode_(SkXfermode::kSrcOver_Mode),
       draw_blend_mode_(SkXfermode::kSrcOver_Mode),
       scroll_parent_(nullptr),
       layer_or_descendant_is_drawn_tracker_(0),
       sorted_for_recursion_tracker_(0),
       visited_tracker_(0),
       clip_parent_(nullptr),
       replica_layer_(nullptr),
@@ skipping 897 matching lines @@
 
 void Layer::SetTouchEventHandlerRegion(const Region& region) {
   DCHECK(IsPropertyChangeAllowed());
   if (touch_event_handler_region_ == region)
     return;
 
   touch_event_handler_region_ = region;
   SetNeedsCommit();
 }
 
-void Layer::SetScrollBlocksOn(ScrollBlocksOn scroll_blocks_on) {
-  DCHECK(IsPropertyChangeAllowed());
-  if (scroll_blocks_on_ == scroll_blocks_on)
-    return;
-  scroll_blocks_on_ = scroll_blocks_on;
-  SetNeedsCommit();
-}
-
 void Layer::SetForceRenderSurface(bool force) {
   DCHECK(IsPropertyChangeAllowed());
   if (force_render_surface_ == force)
     return;
   force_render_surface_ = force;
   SetNeedsCommit();
 }
 
 void Layer::SetDoubleSided(bool double_sided) {
   DCHECK(IsPropertyChangeAllowed());
@@ skipping 202 matching lines @@
   if (!layer->FilterIsAnimatingOnImplOnly() && !FilterIsAnimating())
     layer->SetFilters(filters_);
   DCHECK(!(FilterIsAnimating() && layer->FilterIsAnimatingOnImplOnly()));
   layer->SetBackgroundFilters(background_filters());
   layer->SetMasksToBounds(masks_to_bounds_);
   layer->set_main_thread_scrolling_reasons(main_thread_scrolling_reasons_);
   layer->SetHaveWheelEventHandlers(have_wheel_event_handlers_);
   layer->SetHaveScrollEventHandlers(have_scroll_event_handlers_);
   layer->SetNonFastScrollableRegion(non_fast_scrollable_region_);
   layer->SetTouchEventHandlerRegion(touch_event_handler_region_);
-  layer->SetScrollBlocksOn(scroll_blocks_on_);
   layer->SetContentsOpaque(contents_opaque_);
   if (!layer->OpacityIsAnimatingOnImplOnly() && !OpacityIsAnimating())
     layer->SetOpacity(opacity_);
   DCHECK(!(OpacityIsAnimating() && layer->OpacityIsAnimatingOnImplOnly()));
   layer->SetBlendMode(blend_mode_);
   layer->SetIsRootForIsolatedGroup(is_root_for_isolated_group_);
   layer->SetPosition(position_);
   layer->SetIsContainerForFixedPositionLayers(
       IsContainerForFixedPositionLayers());
   layer->SetPositionConstraint(position_constraint_);
@@ skipping 252 matching lines @@
   // |filters_| and |background_filters_|. See crbug.com/541321.
 
   base->set_masks_to_bounds(masks_to_bounds_);
   base->set_main_thread_scrolling_reasons(main_thread_scrolling_reasons_);
   base->set_have_wheel_event_handlers(have_wheel_event_handlers_);
   base->set_have_scroll_event_handlers(have_scroll_event_handlers_);
   RegionToProto(non_fast_scrollable_region_,
                 base->mutable_non_fast_scrollable_region());
   RegionToProto(touch_event_handler_region_,
                 base->mutable_touch_event_handler_region());
-  base->set_scroll_blocks_on(scroll_blocks_on_);
   base->set_contents_opaque(contents_opaque_);
   base->set_opacity(opacity_);
   base->set_blend_mode(SkXfermodeModeToProto(blend_mode_));
   base->set_is_root_for_isolated_group(is_root_for_isolated_group_);
   PointFToProto(position_, base->mutable_position());
   base->set_is_container_for_fixed_position_layers(
       is_container_for_fixed_position_layers_);
   position_constraint_.ToProtobuf(base->mutable_position_constraint());
   base->set_should_flatten_transform(should_flatten_transform_);
   base->set_should_flatten_transform_from_property_tree(
@@ skipping 66 matching lines @@
   hide_layer_and_subtree_ = base.hide_layer_and_subtree();
   has_render_surface_ = base.has_render_surface();
   masks_to_bounds_ = base.masks_to_bounds();
   main_thread_scrolling_reasons_ = base.main_thread_scrolling_reasons();
   have_wheel_event_handlers_ = base.have_wheel_event_handlers();
   have_scroll_event_handlers_ = base.have_scroll_event_handlers();
   non_fast_scrollable_region_ =
       RegionFromProto(base.non_fast_scrollable_region());
   touch_event_handler_region_ =
       RegionFromProto(base.touch_event_handler_region());
-  scroll_blocks_on_ = (ScrollBlocksOn)base.scroll_blocks_on();
   contents_opaque_ = base.contents_opaque();
   opacity_ = base.opacity();
   blend_mode_ = SkXfermodeModeFromProto(base.blend_mode());
   is_root_for_isolated_group_ = base.is_root_for_isolated_group();
   position_ = ProtoToPointF(base.position());
   is_container_for_fixed_position_layers_ =
       base.is_container_for_fixed_position_layers();
   position_constraint_.FromProtobuf(base.position_constraint());
   should_flatten_transform_ = base.should_flatten_transform();
   should_flatten_transform_from_property_tree_ =
@@ skipping 438 matching lines @@
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 gfx::Transform Layer::screen_space_transform() const {
   DCHECK_NE(transform_tree_index_, -1);
   return ScreenSpaceTransformFromPropertyTrees(
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 }  // namespace cc