[Mac] First part of Omnibox decoration refactor. Enable ev bubble.

chrome/browser/cocoa/location_bar/location_icon_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_LOCATION_ICON_DECORATION_H_
+#define CHROME_BROWSER_COCOA_LOCATION_BAR_LOCATION_ICON_DECORATION_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/scoped_nsobject.h"
+#include "chrome/browser/cocoa/location_bar/location_bar_decoration.h"
+
+class LocationBarViewMac;
+
+// LocationIconDecoration is used to display an icon to the left of
+// the address.
+
+class LocationIconDecoration : public LocationBarDecoration {
+ public:
+  explicit LocationIconDecoration(LocationBarViewMac* owner);
+  virtual ~LocationIconDecoration();
+
+  // The image to display for the location.
+  NSImage* GetImage();
+  void SetImage(NSImage* image);
+
+  // Implement |LocationBarDecoration|.
+  virtual CGFloat GetWidthForSpace(CGFloat width);
+  virtual void DrawInFrame(NSRect frame, NSView* control_view);
+
+  // Allow dragging the current URL.
+  virtual bool IsDraggable();
+  virtual NSPasteboard* GetDragPasteboard();
+  virtual NSImage* GetDragImage() { return GetImage(); }
+
+  // Show the page info panel on click.
+  virtual bool OnMousePressed(NSRect frame);
+
+ private:
+  // The location bar view that owns us.
+  LocationBarViewMac* owner_;
+
+  scoped_nsobject<NSImage> image_;
+
+  DISALLOW_COPY_AND_ASSIGN(LocationIconDecoration);
+};
+
+#endif  // CHROME_BROWSER_COCOA_LOCATION_BAR_LOCATION_ICON_DECORATION_H_