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

ash/wm/system_modal_container_layout_manager_unittest.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/system_modal_container_layout_manager.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 55 matching lines @@
   explicit TestWindow(bool modal) : modal_(modal) {}
   virtual ~TestWindow() {}
 
   // The window needs be closed from widget in order for
   // aura::client::kModalKey property to be reset.
   static void CloseTestWindow(aura::Window* window) {
     views::Widget::GetWidgetForNativeWindow(window)->Close();
   }
 
   // Overridden from views::View:
-  virtual gfx::Size GetPreferredSize() OVERRIDE {
+  virtual gfx::Size GetPreferredSize() const OVERRIDE {
     return gfx::Size(50, 50);
   }
 
   // Overridden from views::WidgetDelegate:
   virtual views::View* GetContentsView() OVERRIDE {
     return this;
   }
   virtual ui::ModalType GetModalType() const OVERRIDE {
     return modal_ ? ui::MODAL_TYPE_SYSTEM : ui::MODAL_TYPE_NONE;
   }
@@ skipping 500 matching lines @@
 
   // After the keyboard is gone, the window will remain where it was.
   ShowKeyboard(false);
   EXPECT_NE(modal_bounds.ToString(), modal_window->bounds().ToString());
   EXPECT_EQ(modal_size.ToString(), modal_window->bounds().size().ToString());
   EXPECT_EQ(modal_origin.x(), modal_window->bounds().x());
 }
 
 }  // namespace test
 }  // namespace ash