Blink handle selection handle visibility

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 <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1913 matching lines @@
   bool update_lcd_text = false;
   if (!UpdateDrawProperties(update_lcd_text))
     return NULL;
   FindTouchEventLayerFunctor func = {screen_space_point};
   FindClosestMatchingLayerState state;
   FindClosestMatchingLayer(screen_space_point, layer_list_[0], func, &state);
   return state.closest_match;
 }
 
 void LayerTreeImpl::RegisterSelection(const LayerSelection& selection) {
+  handle_visibility_changed_ =
+      selection_.is_handle_visible != selection.is_handle_visible;
   selection_ = selection;
 }
 
+bool LayerTreeImpl::HandleVisibilityChanged() {
+  return handle_visibility_changed_;
+}
+
 static gfx::SelectionBound ComputeViewportSelectionBound(
     const LayerSelectionBound& layer_bound,
     LayerImpl* layer,
     float device_scale_factor) {
   gfx::SelectionBound viewport_bound;
   viewport_bound.set_type(layer_bound.type);
 
   if (!layer || layer_bound.type == gfx::SelectionBound::EMPTY)
     return viewport_bound;
 
@@ skipping 42 matching lines @@
 void LayerTreeImpl::GetViewportSelection(
     Selection<gfx::SelectionBound>* selection) {
   DCHECK(selection);
 
   selection->start = ComputeViewportSelectionBound(
       selection_.start,
       selection_.start.layer_id ? LayerById(selection_.start.layer_id) : NULL,
       device_scale_factor());
   selection->is_editable = selection_.is_editable;
   selection->is_empty_text_form_control = selection_.is_empty_text_form_control;
+  selection->is_handle_visible = selection_.is_handle_visible;
   if (selection->start.type() == gfx::SelectionBound::CENTER ||
       selection->start.type() == gfx::SelectionBound::EMPTY) {
     selection->end = selection->start;
   } else {
     selection->end = ComputeViewportSelectionBound(
         selection_.end,
         selection_.end.layer_id ? LayerById(selection_.end.layer_id) : NULL,
         device_scale_factor());
   }
 }
@@ skipping 24 matching lines @@
 
 void LayerTreeImpl::ResetAllChangeTracking() {
   layers_that_should_push_properties_.clear();
   // Iterate over all layers, including masks and replicas.
   for (auto& layer : *layers_)
     layer->ResetChangeTracking();
   property_trees_.ResetAllChangeTracking();
 }
 
 }  // namespace cc