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

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 247 matching lines @@
   gfx::Rect GetVisibleBounds() const;
 
   // Return the bounds of the View in screen coordinate system.
   gfx::Rect GetBoundsInScreen() const;
 
   // Returns the baseline of this view, or -1 if this view has no baseline. The
   // return value is relative to the preferred height.
   virtual int GetBaseline() const;
 
   // Get the size the View would like to be, if enough space were available.
-  virtual gfx::Size GetPreferredSize();
+  virtual gfx::Size GetPreferredSize() const;
 
   // 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();
+  virtual gfx::Size GetMinimumSize() const;
 
   // Gets the maximum size of the view. Currently only used for sizing shell
   // windows.
   virtual gfx::Size GetMaximumSize();
 
   // 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);
+  virtual int GetHeightForWidth(int w) const;
 
   // Set whether this view is visible. Painting is scheduled as needed.
   virtual void SetVisible(bool visible);
 
   // Return whether a view is visible
   bool visible() const { return visible_; }
 
   // Returns true if this view is drawn on screen.
   virtual bool IsDrawn() const;
 
@@ skipping 1310 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_