Revert of Revert of Migrate accessibility from RenderView to RenderFrame.

content/browser/accessibility/accessibility_tree_formatter.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_ACCESSIBILITY_TREE_FORMATTER_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_ACCESSIBILITY_TREE_FORMATTER_H_
 
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "content/browser/accessibility/browser_accessibility.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
-class RenderViewHost;
+class WebContents;
 
 // A utility class for formatting platform-specific accessibility information,
 // for use in testing, debugging, and developer tools.
 // This is extended by a subclass for each platform where accessibility is
 // implemented.
 class CONTENT_EXPORT AccessibilityTreeFormatter {
  public:
   explicit AccessibilityTreeFormatter(BrowserAccessibility* root);
   virtual ~AccessibilityTreeFormatter();
 
-  static AccessibilityTreeFormatter* Create(RenderViewHost* rvh);
+  static AccessibilityTreeFormatter* Create(WebContents* wc);
 
   // Populates the given DictionaryValue with the accessibility tree.
   // The dictionary contains a key/value pair for each attribute of the node,
   // plus a "children" attribute containing a list of all child nodes.
   // {
   //   "AXName": "node",  /* actual attributes will vary by platform */
   //   "position": {  /* some attributes may be dictionaries */
   //     "x": 0,
   //     "y": 0
   //   },
@@ skipping 99 matching lines @@
 
   // Filters used when formatting the accessibility tree as text.
   std::vector<Filter> filters_;
 
   DISALLOW_COPY_AND_ASSIGN(AccessibilityTreeFormatter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_ACCESSIBILITY_TREE_FORMATTER_H_