Make BrowserAccessibilityManager cross platform. Step 1....

chrome/browser/accessibility/browser_accessibility_manager.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_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_
+#define CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_
+#pragma once
+
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+#include <oleacc.h>
+#endif
+
+#include <vector>
+
+#include "gfx/native_widget_types.h"
+#include "webkit/glue/webaccessibility.h"
+
+struct ViewHostMsg_AccessibilityNotification_Params;
+
+using webkit_glue::WebAccessibility;
+
+// Class that can perform actions on behalf of the BrowserAccessibilityManager.
+class BrowserAccessibilityDelegate {
+ public:
+  virtual ~BrowserAccessibilityDelegate() {}
+  virtual void SetAccessibilityFocus(int acc_obj_id) = 0;
+  virtual void AccessibilityDoDefaultAction(int acc_obj_id) = 0;
+};
+
+// Manages a tree of BrowserAccessibility objects.
+class BrowserAccessibilityManager {
+ public:
+  // Creates the platform specific BrowserAccessibilityManager. Ownership passes
+  // to the caller.
+  static BrowserAccessibilityManager* Create(
+    gfx::NativeWindow parent_window,
+    const webkit_glue::WebAccessibility& src,
+    BrowserAccessibilityDelegate* delegate);
+
+  virtual ~BrowserAccessibilityManager();
+
+  // Called when the renderer process has notified us of about tree changes.
+  // Send a notification to MSAA clients of the change.
+  void OnAccessibilityNotifications(
+    const std::vector<ViewHostMsg_AccessibilityNotification_Params>& params);
+
+  gfx::NativeWindow GetParentWindow();
+
+#if defined(OS_WIN)
+  virtual IAccessible* GetRootAccessible() = 0;
+#endif
+
+ protected:
+  explicit BrowserAccessibilityManager(gfx::NativeWindow parent_window);
+
+  virtual void OnAccessibilityObjectStateChange(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
+  virtual void OnAccessibilityObjectChildrenChange(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
+  virtual void OnAccessibilityObjectFocusChange(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
+  virtual void OnAccessibilityObjectLoadComplete(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
+  virtual void OnAccessibilityObjectValueChange(
+      const webkit_glue::WebAccessibility& acc_obj) = 0;
+
+ private:
+  // The parent window.
+  gfx::NativeWindow parent_window_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManager);
+};
+
+#endif  // CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_