Add basic support for accessibility hit testing within web contents....

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 <vector>
 
 #include "base/hash_tables.h"
 #include "base/scoped_ptr.h"
 #include "build/build_config.h"
 #include "chrome/common/render_messages_params.h"
 #include "gfx/native_widget_types.h"
 #include "webkit/glue/webaccessibility.h"
 
-
 class BrowserAccessibility;
 #if defined(OS_WIN)
 class BrowserAccessibilityManagerWin;
 #endif
 
 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;
   virtual bool HasFocus() = 0;
+  virtual gfx::Rect GetViewBounds() const = 0;
 };
 
 class BrowserAccessibilityFactory {
  public:
   virtual ~BrowserAccessibilityFactory() {}
 
   // Create an instance of BrowserAccessibility and return a new
   // reference to it.
   virtual BrowserAccessibility* Create();
 };
@@ skipping 31 matching lines @@
   // Called to notify the accessibility manager that its associated native
   // view got focused.
   void GotFocus();
 
   // Tell the renderer to set focus to this node.
   void SetFocus(const BrowserAccessibility& node);
 
   // Tell the renderer to do the default action for this node.
   void DoDefaultAction(const BrowserAccessibility& node);
 
+  // Retrieve the bounds of the parent View in screen coordinates.
+  gfx::Rect GetViewBounds();
+
   // 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::NativeView GetParentView();
 
 #if defined(OS_WIN)
   BrowserAccessibilityManagerWin* toBrowserAccessibilityManagerWin();
 #endif
@@ skipping 73 matching lines @@
   // we use internally here.
   base::hash_map<int, int32> renderer_id_to_child_id_map_;
 
   // A mapping from child IDs to BrowserAccessibility objects.
   base::hash_map<int32, BrowserAccessibility*> child_id_map_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManager);
 };
 
 #endif  // CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_H_