views: Make view::Views::GetPreferredSize() const.

ash/wm/gestures/long_press_affordance_handler.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/wm/gestures/long_press_affordance_handler.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 169 matching lines @@
     current_scale_ = animation->CurrentValueBetween(kAffordanceScaleEndValue,
         kAffordanceShrinkScaleEndValue);
     widget_->GetNativeView()->layer()->SetOpacity(
         animation->CurrentValueBetween(kAffordanceOpacityEndValue,
             kAffordanceOpacityStartValue));
     SchedulePaint();
   }
 
  private:
   // Overridden from views::View.
-  virtual gfx::Size GetPreferredSize() OVERRIDE {
+  virtual gfx::Size GetPreferredSize() const OVERRIDE {
     return gfx::Size(2 * (kAffordanceOuterRadius + kAffordanceGlowWidth),
         2 * (kAffordanceOuterRadius + kAffordanceGlowWidth));
   }
 
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
     gfx::Point center(GetPreferredSize().width() / 2,
                       GetPreferredSize().height() / 2);
     canvas->Save();
 
     gfx::Transform scale;
@@ skipping 157 matching lines @@
       break;
   }
 }
 
 void LongPressAffordanceHandler::OnWindowDestroying(aura::Window* window) {
   DCHECK_EQ(tap_down_target_, window);
   StopAffordance();
 }
 
 }  // namespace ash