[Mac] Star as a rhs-decoration in AutocompleteTextFieldCell.

chrome/browser/cocoa/location_bar/image_decoration.h

+// Copyright (c) 2010 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 CHROME_BROWSER_COCOA_LOCATION_BAR_IMAGE_DECORATION_H_
+#define CHROME_BROWSER_COCOA_LOCATION_BAR_IMAGE_DECORATION_H_
+
+#import "base/scoped_nsobject.h"
+#include "chrome/browser/cocoa/location_bar/location_bar_decoration.h"
+
+// |LocationBarDecoration| which sizes and draws itself according to
+// an |NSImage|.
+
+class ImageDecoration : public LocationBarDecoration {
+ public:
+  ImageDecoration();
+  virtual ~ImageDecoration();
+
+  NSImage* GetImage();
+  void SetImage(NSImage* image);
+
+  // Returns the part of |frame| the image is drawn in.
+  NSRect GetDrawRectInFrame(NSRect frame);
+
+  // Implement |LocationBarDecoration|.
+  virtual CGFloat GetWidthForSpace(CGFloat width);
+  virtual void DrawInFrame(NSRect frame, NSView* control_view);
+
+ private:
+  scoped_nsobject<NSImage> image_;
+
+  DISALLOW_COPY_AND_ASSIGN(ImageDecoration);
+};
+
+#endif  // CHROME_BROWSER_COCOA_LOCATION_BAR_IMAGE_DECORATION_H_