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

webkit/glue/webaccessibility.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 WEBKIT_GLUE_WEBACCESSIBILITY_H_
 #define WEBKIT_GLUE_WEBACCESSIBILITY_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 144 matching lines @@
 
   // Additional optional attributes that can be optionally attached to
   // a node.
   enum Attribute {
     // Doc attributes: only make sense when applied to the top-level
     // Document node.
     ATTR_DOC_URL,
     ATTR_DOC_TITLE,
     ATTR_DOC_MIMETYPE,
     ATTR_DOC_DOCTYPE,
+    ATTR_DOC_SCROLLX,
+    ATTR_DOC_SCROLLY,
 
     // Editable text attributes
     ATTR_TEXT_SEL_START,
     ATTR_TEXT_SEL_END,
 
     // Attributes that could apply to any node.
     ATTR_ACTION,
     ATTR_DESCRIPTION,
     ATTR_DISPLAY,
     ATTR_HELP,
@@ skipping 27 matching lines @@
   uint32 state;
   WebKit::WebRect location;
   std::map<int32, string16> attributes;
   std::vector<WebAccessibility> children;
   std::vector<std::pair<string16, string16> > html_attributes;
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_GLUE_WEBACCESSIBILITY_H_