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

components/infobars/core/infobar_container.h

 // Copyright 2014 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 COMPONENTS_INFOBARS_CORE_INFOBAR_CONTAINER_H_
 #define COMPONENTS_INFOBARS_CORE_INFOBAR_CONTAINER_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 36 matching lines @@
 
   // Changes the InfoBarManager for which this container is showing infobars.
   // This will hide all current infobars, remove them from the container, add
   // the infobars from |infobar_manager|, and show them all.  |infobar_manager|
   // may be NULL.
   void ChangeInfoBarManager(InfoBarManager* infobar_manager);
 
   // Returns the amount by which to overlap the toolbar above, and, when
   // |total_height| is non-NULL, set it to the height of the InfoBarContainer
   // (including overlap).
-  int GetVerticalOverlap(int* total_height);
+  int GetVerticalOverlap(int* total_height) const;
 
   // Called by the delegate when the distance between what the top infobar's
   // "unspoofable" arrow would point to and the top infobar itself changes.
   // This enables the top infobar to show a longer arrow (e.g. because of a
   // visible bookmark bar) or shorter (e.g. due to being in a popup window) if
   // desired.
   //
   // IMPORTANT: This MUST NOT result in a call back to
   // Delegate::InfoBarContainerStateChanged() unless it causes an actual
   // change, lest we infinitely recurse.
@@ skipping 60 matching lines @@
 
   // Calculated in SetMaxTopArrowHeight().
   int top_arrow_target_height_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarContainer);
 };
 
 }  // namespace infobars
 
 #endif  // COMPONENTS_INFOBARS_CORE_INFOBAR_CONTAINER_H_