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

chrome/browser/cocoa/location_bar/ev_bubble_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_EV_BUBBLE_DECORATION_H_
+#define CHROME_BROWSER_COCOA_LOCATION_BAR_EV_BUBBLE_DECORATION_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "chrome/browser/cocoa/location_bar/bubble_decoration.h"
+
+// Draws the "Extended Validation SSL" bubble.  This will be a lock
+// icon plus a label from the certification, and will replace the
+// location icon for URLs which have an EV cert.  The |location_icon|
+// is used to fulfill drag-related calls.
+
+// TODO(shess): Refactor to pull the |location_icon| functionality out
+// into a distinct class like views |ClickHandler|.
+// http://crbug.com/48866
+
+class LocationIconDecoration;
+
+class EVBubbleDecoration : public BubbleDecoration {
+ public:
+  EVBubbleDecoration(LocationIconDecoration* location_icon, NSFont* font);
+
+  // Implement |LocationBarDecoration|.
+  virtual bool IsDraggable();
+  virtual NSPasteboard* GetDragPasteboard();
+  virtual NSImage* GetDragImage();
+  virtual bool OnMousePressed(NSRect frame);
+
+ private:
+  LocationIconDecoration* location_icon_;  // weak, owned by location bar.
+
+  DISALLOW_COPY_AND_ASSIGN(EVBubbleDecoration);
+};
+
+#endif  // CHROME_BROWSER_COCOA_LOCATION_BAR_EV_BUBBLE_DECORATION_H_