Properly scale the coordinate for TouchSelection when use-zoom-for-dsf mode is on.

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 1791 matching lines @@
 
   float intersect_distance = 0.f;
   viewport_bound.visible = PointHitsLayer(
       layer, visibility_point, &intersect_distance, transform_tree, clip_tree);
 
   return viewport_bound;
 }
 
 void LayerTreeImpl::GetViewportSelection(ViewportSelection* selection) {
   DCHECK(selection);
-
   selection->start = ComputeViewportSelectionBound(
       selection_.start,
       selection_.start.layer_id ? LayerById(selection_.start.layer_id) : NULL,
-      device_scale_factor(), property_trees_.transform_tree,
-      property_trees_.clip_tree);
+      device_scale_factor() * painted_device_scale_factor(),
+      property_trees_.transform_tree, property_trees_.clip_tree);
   selection->is_editable = selection_.is_editable;
   selection->is_empty_text_form_control = selection_.is_empty_text_form_control;
   if (selection->start.type == SELECTION_BOUND_CENTER ||
       selection->start.type == SELECTION_BOUND_EMPTY) {
     selection->end = selection->start;
   } else {
     selection->end = ComputeViewportSelectionBound(
         selection_.end,
         selection_.end.layer_id ? LayerById(selection_.end.layer_id) : NULL,
-        device_scale_factor(), property_trees_.transform_tree,
-        property_trees_.clip_tree);
+        device_scale_factor() * painted_device_scale_factor(),
+        property_trees_.transform_tree, property_trees_.clip_tree);
   }
 }
 
 void LayerTreeImpl::InputScrollAnimationFinished() {
   // TODO(majidvp): We should pass in the original starting scroll position here
   ScrollStateData scroll_state_data;
   ScrollState scroll_state(scroll_state_data);
   layer_tree_host_impl_->ScrollEnd(&scroll_state);
 }
 
@@ skipping 183 matching lines @@
                                                    const gfx::BoxF& box,
                                                    gfx::BoxF* bounds) const {
   *bounds = gfx::BoxF();
   return layer_tree_host_impl_->animation_host()
              ? layer_tree_host_impl_->animation_host()
                    ->TransformAnimationBoundsForBox(layer->id(), box, bounds)
              : true;
 }
 
 }  // namespace cc