views: Also const-ify GetMaximumSize().

ui/views/widget/widget.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/views/widget/widget.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 1078 matching lines @@
   widget_delegate_->WindowClosing();
 }
 
 void Widget::OnNativeWidgetDestroyed() {
   FOR_EACH_OBSERVER(WidgetObserver, observers_, OnWidgetDestroyed(this));
   widget_delegate_->DeleteDelegate();
   widget_delegate_ = NULL;
   native_widget_destroyed_ = true;
 }
 
-gfx::Size Widget::GetMinimumSize() {
+gfx::Size Widget::GetMinimumSize() const {
   return non_client_view_ ? non_client_view_->GetMinimumSize() : gfx::Size();
 }
 
-gfx::Size Widget::GetMaximumSize() {
+gfx::Size Widget::GetMaximumSize() const {
   return non_client_view_ ? non_client_view_->GetMaximumSize() : gfx::Size();
 }
 
 void Widget::OnNativeWidgetMove() {
   widget_delegate_->OnWidgetMove();
   if (GetRootView()->GetFocusManager()) {
     View* focused_view = GetRootView()->GetFocusManager()->GetFocusedView();
     if (focused_view && focused_view->GetInputMethod())
       focused_view->GetInputMethod()->OnCaretBoundsChanged(focused_view);
   }
@@ skipping 400 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // internal::NativeWidgetPrivate, NativeWidget implementation:
 
 internal::NativeWidgetPrivate* NativeWidgetPrivate::AsNativeWidgetPrivate() {
   return this;
 }
 
 }  // namespace internal
 }  // namespace views