MacViews: Implement NSAccessibilityPressAction for Views with clickable roles.

content/browser/accessibility/browser_accessibility.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 CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 218 matching lines @@
   uint32_t InternalChildCount() const;
   BrowserAccessibility* InternalGetChild(uint32_t child_index) const;
   BrowserAccessibility* InternalGetParent() const;
 
   BrowserAccessibility* GetParent() const;
   int32_t GetIndexInParent() const;
 
   int32_t GetId() const;
   const ui::AXNodeData& GetData() const;
   gfx::RectF GetLocation() const;
-  int32_t GetRole() const;
+  ui::AXRole GetRole() const;
   int32_t GetState() const;
 
   typedef base::StringPairs HtmlAttributes;
   const HtmlAttributes& GetHtmlAttributes() const;
 
   // Returns true if this is a native platform-specific object, vs a
   // cross-platform generic object. Don't call ToBrowserAccessibilityXXX if
   // IsNative returns false.
   virtual bool IsNative() const;
 
@@ skipping 131 matching lines @@
   // bounds, but "virtual" elements in the accessibility tree that don't
   // correspond to a layed-out element sometimes don't have bounds.
   void FixEmptyBounds(gfx::RectF* bounds) const;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_