views: Also const-ify GetMaximumSize().

ui/views/view.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_VIEW_H_
 #define UI_VIEWS_VIEW_H_
 
 #include <algorithm>
 #include <map>
 #include <set>
@@ skipping 258 matching lines @@
 
   // Convenience method that sizes this view to its preferred size.
   void SizeToPreferredSize();
 
   // Gets the minimum size of the view. View's implementation invokes
   // GetPreferredSize.
   virtual gfx::Size GetMinimumSize() const;
 
   // Gets the maximum size of the view. Currently only used for sizing shell
   // windows.
-  virtual gfx::Size GetMaximumSize();
+  virtual gfx::Size GetMaximumSize() const;
 
   // Return the height necessary to display this view with the provided width.
   // View's implementation returns the value from getPreferredSize.cy.
   // Override if your View's preferred height depends upon the width (such
   // as with Labels).
   virtual int GetHeightForWidth(int w) const;
 
   // Set whether this view is visible. Painting is scheduled as needed.
   virtual void SetVisible(bool visible);
 
@@ skipping 1316 matching lines @@
   // Belongs to this view, but it's reference-counted on some platforms
   // so we can't use a scoped_ptr. It's dereferenced in the destructor.
   NativeViewAccessibility* native_view_accessibility_;
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEW_H_