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

content/browser/accessibility/browser_accessibility_cocoa.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 <execinfo.h>
 
 #import "content/browser/accessibility/browser_accessibility_cocoa.h"
 
 #include <map>
 
@@ skipping 281 matching lines @@
     { NSAccessibilityURLAttribute, @"url" },
     { NSAccessibilityValueAttribute, @"value" },
     { NSAccessibilityValueDescriptionAttribute, @"valueDescription" },
     { NSAccessibilityVisibleCharacterRangeAttribute, @"visibleCharacterRange" },
     { NSAccessibilityWindowAttribute, @"window" },
     { @"AXAccessKey", @"accessKey" },
     { @"AXARIAAtomic", @"ariaAtomic" },
     { @"AXARIABusy", @"ariaBusy" },
     { @"AXARIALive", @"ariaLive" },
     { @"AXARIARelevant", @"ariaRelevant" },
+    { @"AXInvalid", @"invalid" },
     { @"AXLoaded", @"loaded" },
     { @"AXLoadingProgress", @"loadingProgress" },
     { @"AXRequired", @"required" },
     { @"AXVisited", @"visited" },
   };
 
   NSMutableDictionary* dict = [[NSMutableDictionary alloc] init];
   const size_t numAttributes = sizeof(attributeToMethodNameContainer) /
                                sizeof(attributeToMethodNameContainer[0]);
   for (size_t i = 0; i < numAttributes; ++i) {
@@ skipping 164 matching lines @@
       browserAccessibility_->string_attributes(),
       AccessibilityNodeData::ATTR_HELP);
 }
 
 // Returns whether or not this node should be ignored in the
 // accessibility tree.
 - (BOOL)isIgnored {
   return [[self role] isEqualToString:NSAccessibilityUnknownRole];
 }
 
+- (NSString*)invalid {
+  string16 invalidUTF;
+  if (!browserAccessibility_->GetHtmlAttribute("aria-invalid", &invalidUTF))
+    return NULL;
+  NSString* invalid = base::SysUTF16ToNSString(invalidUTF);
+  if ([invalid isEqualToString:@"false"] ||
+      [invalid isEqualToString:@""]) {
+    return @"false";
+  }
+  return invalid;
+}
+
 - (NSNumber*)loaded {
   return [NSNumber numberWithBool:YES];
 }
 
 - (NSNumber*)loadingProgress {
   float floatValue = 0.0;
   browserAccessibility_->GetFloatAttribute(
       AccessibilityNodeData::ATTR_DOC_LOADING_PROGRESS, &floatValue);
   return [NSNumber numberWithFloat:floatValue];
 }
@@ skipping 629 matching lines @@
     return [super hash];
   return browserAccessibility_->renderer_id();
 }
 
 - (BOOL)accessibilityShouldUseUniqueId {
   return YES;
 }
 
 @end