Adding some new DumpAccessibilityTree tests, tweaking DumpAccessibilityTree helpers and fixing a bug

content/browser/accessibility/dump_accessibility_tree_helper_mac.mm

 // 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.
 
 #include "content/browser/accessibility/dump_accessibility_tree_helper.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/file_path.h"
 #include "base/utf_string_conversions.h"
@@ skipping 20 matching lines @@
 string16 DumpAccessibilityTreeHelper::ToString(BrowserAccessibility* node,
                                                char* prefix) {
   StartLine();
   Add(true, Format(node, "", @selector(role), ""));
   Add(false, Format(node, "subrole=", @selector(subrole), ""));
   Add(false, Format(node, "roleDescription='",
                           @selector(roleDescription),
                           "'"));
   Add(true, Format(node, "title='", @selector(title), "'"));
   Add(true, Format(node, "value='", @selector(value), "'"));
+  Add(false, Format(node, "minValue='", @selector(minValue), "'"));
+  Add(false, Format(node, "maxValue='", @selector(maxValue), "'"));
+  Add(false, Format(node, "valueDescription='", @selector(valueDescription),
+                    "'"));
   Add(false, Format(node, "description='", @selector(description), "'"));
   Add(false, Format(node, "help='", @selector(help), "'"));
+  Add(false, Format(node, "invalid='", @selector(invalid), "'"));
   return ASCIIToUTF16(prefix) + FinishLine() + ASCIIToUTF16("\n");
 }
 
 const FilePath::StringType DumpAccessibilityTreeHelper::GetActualFileSuffix()
     const {
   return FILE_PATH_LITERAL("-actual-mac.txt");
 }
 
 const FilePath::StringType DumpAccessibilityTreeHelper::GetExpectedFileSuffix()
     const {
   return FILE_PATH_LITERAL("-expected-mac.txt");
 }
 
 const std::string DumpAccessibilityTreeHelper::GetAllowString() const {
   return "@MAC-ALLOW:";
 }
 
 const std::string DumpAccessibilityTreeHelper::GetDenyString() const {
   return "@MAC-DENY:";
 }
 
 }  // namespace content