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

ui/views/controls/image_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_CONTROLS_IMAGE_VIEW_H_
 #define UI_VIEWS_CONTROLS_IMAGE_VIEW_H_
 
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/view.h"
 
@@ skipping 37 matching lines @@
   // Returns the image currently displayed or NULL of none is currently set.
   // The returned image is still owned by the ImageView.
   const gfx::ImageSkia& GetImage();
 
   // Set the desired image size for the receiving ImageView.
   void SetImageSize(const gfx::Size& image_size);
 
   // Return the preferred size for the receiving view. Returns false if the
   // preferred size is not defined, which means that the view uses the image
   // size.
-  bool GetImageSize(gfx::Size* image_size);
+  bool GetImageSize(gfx::Size* image_size) const;
 
   // Returns the actual bounds of the visible image inside the view.
   gfx::Rect GetImageBounds() const;
 
   // Reset the image size to the current image dimensions.
   void ResetImageSize();
 
   // Set / Get the horizontal alignment.
   void SetHorizontalAlignment(Alignment ha);
   Alignment GetHorizontalAlignment() const;
 
   // Set / Get the vertical alignment.
   void SetVerticalAlignment(Alignment va);
   Alignment GetVerticalAlignment() const;
 
   // Set / Get the tooltip text.
   void SetTooltipText(const base::string16& tooltip);
   base::string16 GetTooltipText() const;
 
   void set_interactive(bool interactive) { interactive_ = interactive; }
 
   void SetFocusPainter(scoped_ptr<Painter> focus_painter);
 
   // Overriden from View:
-  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual gfx::Size GetPreferredSize() const OVERRIDE;
   virtual void OnFocus() OVERRIDE;
   virtual void OnBlur() OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
   virtual bool GetTooltipText(const gfx::Point& p,
                               base::string16* tooltip) const OVERRIDE;
   virtual bool HitTestRect(const gfx::Rect& rect) const OVERRIDE;
 
  private:
   void OnPaintImage(gfx::Canvas* canvas);
@@ skipping 36 matching lines @@
   void* last_painted_bitmap_pixels_;
 
   scoped_ptr<views::Painter> focus_painter_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_IMAGE_VIEW_H_