Declares GetHeightForWidth() for those who need it.

ash/system/tray/hover_highlight_view.h

 // Copyright 2013 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 ASH_SYSTEM_TRAY_HOVER_HIGHLIGHT_VIEW_H_
 #define ASH_SYSTEM_TRAY_HOVER_HIGHLIGHT_VIEW_H_
 
 #include "ash/system/tray/actionable_view.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 46 matching lines @@
   views::Label* text_label() { return text_label_; }
 
   bool hover() const { return hover_; }
 
  private:
   // Overridden from ActionableView:
   virtual bool PerformAction(const ui::Event& event) OVERRIDE;
 
   // Overridden from views::View.
   virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual int GetHeightForWidth(int width) OVERRIDE;
   virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnEnabledChanged() OVERRIDE;
   virtual void OnPaintBackground(gfx::Canvas* canvas) OVERRIDE;
   virtual void OnFocus() OVERRIDE;
 
   ViewClickListener* listener_;
   views::Label* text_label_;
   SkColor highlight_color_;
   SkColor default_color_;
   SkColor text_highlight_color_;
   SkColor text_default_color_;
   bool hover_;
   bool expandable_;
 
   DISALLOW_COPY_AND_ASSIGN(HoverHighlightView);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_HOVER_HIGHLIGHT_VIEW_H_