gfx: Make conversions from Size to SizeF be explicit.

ash/display/display_manager.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 "ash/display/display_manager.h"
 
 #include <algorithm>
 #include <cmath>
 #include <set>
 #include <string>
@@ skipping 1281 matching lines @@
 
 gfx::Display DisplayManager::CreateMirroringDisplayFromDisplayInfoById(
     int64 id,
     const gfx::Point& origin,
     float scale) {
   DCHECK(display_info_.find(id) != display_info_.end()) << "id=" << id;
   const DisplayInfo& display_info = display_info_[id];
 
   gfx::Display new_display(display_info.id());
   new_display.SetScaleAndBounds(
-      1.0f, gfx::Rect(origin, gfx::ToFlooredSize(gfx::ScaleSize(
-                                  display_info.size_in_pixel(), scale))));
+      1.0f, gfx::Rect(origin, gfx::ScaleToFlooredSize(
+                                  display_info.size_in_pixel(), scale)));
   new_display.set_touch_support(display_info.touch_support());
   return new_display;
 }
 
 bool DisplayManager::UpdateNonPrimaryDisplayBoundsForLayout(
     DisplayList* displays,
     std::vector<size_t>* updated_indices) const {
 
   if (displays->size() < 2U)
     return false;
@@ skipping 96 matching lines @@
       gfx::Rect(new_secondary_origin, secondary_bounds.size()));
   secondary_display->UpdateWorkAreaFromInsets(insets);
 }
 
 void DisplayManager::RunPendingTasksForTest() {
   if (!software_mirroring_display_list_.empty())
     base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace ash