Round the snapped position when checking snapped

ui/compositor/dip_util.cc

 // Copyright (c) 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 "ui/compositor/dip_util.h"
 
 #include "base/command_line.h"
 #include "cc/layers/layer.h"
 #include "ui/compositor/compositor.h"
 #include "ui/compositor/compositor_switches.h"
@@ skipping 63 matching lines @@
   return gfx::ToEnclosingRect(
       gfx::RectF(gfx::ScalePoint(rect_in_dip.origin(), scale),
                  gfx::ScaleSize(rect_in_dip.size(), scale)));
 }
 
 #if DCHECK_IS_ON
 namespace {
 
 void CheckSnapped(float snapped_position) {
   const float kEplison = 0.0001f;
-  float diff = std::abs(snapped_position - static_cast<int>(snapped_position));
+  float diff = std::abs(snapped_position - gfx::ToRoundedInt(snapped_position));
   DCHECK_LT(diff, kEplison);
 }
 
 }  // namespace
 #endif
 
 void SnapLayerToPhysicalPixelBoundary(ui::Layer* snapped_layer,
                                       ui::Layer* layer_to_snap) {
   DCHECK_NE(snapped_layer, layer_to_snap);
   DCHECK(snapped_layer);
@@ skipping 23 matching lines @@
   } else {
     cc::Layer* cc_layer = layer_to_snap->cc_layer();
     origin = cc_layer->position();
   }
   CheckSnapped((layer_offset.x() + origin.x()) * scale_factor);
   CheckSnapped((layer_offset.y() + origin.y()) * scale_factor);
 #endif
 }
 
 }  // namespace ui