Rewrite renderer accessibility to not use WebAccessibilityCache.

chrome/browser/accessibility/renderer_accessibility_browsertest.cc

 // Copyright (c) 2011 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.
 
 #include <string>
 #include <vector>
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
@@ skipping 112 matching lines @@
   // Check properties of the root element of the tree.
   EXPECT_STREQ(url_str, GetAttr(tree, WebAccessibility::ATTR_DOC_URL).c_str());
   EXPECT_STREQ(
       "Accessibility Test",
       GetAttr(tree, WebAccessibility::ATTR_DOC_TITLE).c_str());
   EXPECT_STREQ(
       "html", GetAttr(tree, WebAccessibility::ATTR_DOC_DOCTYPE).c_str());
   EXPECT_STREQ(
       "text/html", GetAttr(tree, WebAccessibility::ATTR_DOC_MIMETYPE).c_str());
   EXPECT_STREQ("Accessibility Test", UTF16ToUTF8(tree.name).c_str());
-  EXPECT_EQ(WebAccessibility::ROLE_WEB_AREA, tree.role);
+  EXPECT_EQ(WebAccessibility::ROLE_ROOT_WEB_AREA, tree.role);
 
   // Check properites of the BODY element.
   ASSERT_EQ(1U, tree.children.size());
   const WebAccessibility& body = tree.children[0];
   EXPECT_EQ(WebAccessibility::ROLE_GROUP, body.role);
   EXPECT_STREQ("body", GetAttr(body, WebAccessibility::ATTR_HTML_TAG).c_str());
   EXPECT_STREQ("block", GetAttr(body, WebAccessibility::ATTR_DISPLAY).c_str());
 
   // Check properties of the two children of the BODY element.
   ASSERT_EQ(2U, body.children.size());
@@ skipping 266 matching lines @@
                           WebAccessibility::ATTR_TABLE_CELL_COLUMN_INDEX));
   EXPECT_EQ(1, GetIntAttr(cell3,
                           WebAccessibility::ATTR_TABLE_CELL_COLUMN_SPAN));
   EXPECT_EQ(1, GetIntAttr(cell4,
                           WebAccessibility::ATTR_TABLE_CELL_COLUMN_INDEX));
   EXPECT_EQ(2, GetIntAttr(cell4,
                           WebAccessibility::ATTR_TABLE_CELL_COLUMN_SPAN));
 }
 
 }  // namespace