views: Also const-ify GetMaximumSize().

ui/views/widget/native_widget_delegate.h

 // 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.
 
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_
 
 #include <vector>
 
 #include "ui/events/event_constants.h"
@@ skipping 62 matching lines @@
   virtual void OnNativeWidgetCreated(bool desktop_widget) = 0;
 
   // Called just before the native widget is destroyed. This is the delegate's
   // last chance to do anything with the native widget handle.
   virtual void OnNativeWidgetDestroying() = 0;
 
   // Called just after the native widget is destroyed.
   virtual void OnNativeWidgetDestroyed() = 0;
 
   // Returns the smallest size the window can be resized to by the user.
-  virtual gfx::Size GetMinimumSize() = 0;
+  virtual gfx::Size GetMinimumSize() const = 0;
 
   // Returns the largest size the window can be resized to by the user.
-  virtual gfx::Size GetMaximumSize() = 0;
+  virtual gfx::Size GetMaximumSize() const = 0;
 
   // Called when the NativeWidget changed position.
   virtual void OnNativeWidgetMove() = 0;
 
   // Called when the NativeWidget changed size to |new_size|.
   virtual void OnNativeWidgetSizeChanged(const gfx::Size& new_size) = 0;
 
   // Called when the user begins/ends to change the bounds of the window.
   virtual void OnNativeWidgetBeginUserBoundsChange() = 0;
   virtual void OnNativeWidgetEndUserBoundsChange() = 0;
@@ skipping 49 matching lines @@
   // later.  Returns true if the initial focus has been set or the window should
   // not set the initial focus, or false if the caller should set the initial
   // focus (if any).
   virtual bool SetInitialFocus(ui::WindowShowState show_state) = 0;
 };
 
 }  // namespace internal
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_