Add initial GTK web accessibility framework (third attempt).

content/browser/accessibility/browser_accessibility_manager_gtk.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_MANAGER_GTK_H_
+#define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_GTK_H_
+#pragma once
+
+#include "content/browser/accessibility/browser_accessibility_manager.h"
+#include "webkit/glue/webaccessibility.h"
+
+class BrowserAccessibilityGtk;
+struct ViewHostMsg_AccessibilityNotification_Params;
+
+using webkit_glue::WebAccessibility;
+
+// Manages a tree of BrowserAccessibilityGtk objects.
+class BrowserAccessibilityManagerGtk : public BrowserAccessibilityManager {
+ public:
+  virtual ~BrowserAccessibilityManagerGtk();
+
+  // BrowserAccessibilityManager methods
+  virtual void NotifyAccessibilityEvent(int type, BrowserAccessibility* node)
+      OVERRIDE;
+
+ private:
+  BrowserAccessibilityManagerGtk(
+      GtkWidget* parent_window,
+      const WebAccessibility& src,
+      BrowserAccessibilityDelegate* delegate,
+      BrowserAccessibilityFactory* factory);
+
+  void RecursivelySendChildrenChanged(BrowserAccessibilityGtk* node);
+
+  // Give BrowserAccessibilityManager::Create access to our constructor.
+  friend class BrowserAccessibilityManager;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerGtk);
+};
+
+#endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_GTK_H_