ui: Make gfx::Point::Scale() mutate the class, similar to gfx::Rect.

ui/aura/root_window.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/aura/root_window.h"
 
 #include <vector>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 327 matching lines @@
 }
 
 void RootWindow::PostNativeEvent(const base::NativeEvent& native_event) {
 #if !defined(OS_MACOSX)
   host_->PostNativeEvent(native_event);
 #endif
 }
 
 void RootWindow::ConvertPointToNativeScreen(gfx::Point* point) const {
   // TODO(oshima): Take the root window's transform into account.
-  *point = gfx::ToFlooredPoint(point->Scale(ui::GetDeviceScaleFactor(layer())));
+  *point = gfx::ToFlooredPoint(
+      gfx::ScalePoint(*point, ui::GetDeviceScaleFactor(layer())));
   gfx::Point location = host_->GetLocationOnNativeScreen();
   point->Offset(location.x(), location.y());
 }
 
 void RootWindow::ConvertPointFromNativeScreen(gfx::Point* point) const {
   gfx::Point location = host_->GetLocationOnNativeScreen();
   point->Offset(-location.x(), -location.y());
   *point = gfx::ToFlooredPoint(
-      point->Scale(1 / ui::GetDeviceScaleFactor(layer())));
+      gfx::ScalePoint(*point, 1 / ui::GetDeviceScaleFactor(layer())));
 }
 
 void RootWindow::ProcessedTouchEvent(ui::TouchEvent* event,
                                      Window* window,
                                      ui::EventResult result) {
   scoped_ptr<ui::GestureRecognizer::Gestures> gestures;
   gestures.reset(gesture_recognizer_->ProcessTouchEventForGesture(
       *event, result, window));
   ProcessGestures(gestures.get());
 }
@@ skipping 671 matching lines @@
   ui::MouseEvent event(ui::ET_MOUSE_MOVED,
                        orig_mouse_location,
                        orig_mouse_location,
                        ui::EF_IS_SYNTHESIZED);
   event.set_system_location(Env::GetInstance()->last_mouse_location());
   OnHostMouseEvent(&event);
 #endif
 }
 
 }  // namespace aura