Make AccessibilityNodeData more compact.

content/browser/accessibility/browser_accessibility_mac_unittest.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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/accessibility/browser_accessibility_cocoa.h"
@@ skipping 50 matching lines @@
     RebuildAccessibilityTree();
   }
 
  protected:
   void RebuildAccessibilityTree() {
     AccessibilityNodeData root;
     root.id = 1000;
     root.location.set_width(500);
     root.location.set_height(100);
     root.role = AccessibilityNodeData::ROLE_ROOT_WEB_AREA;
-    root.string_attributes[AccessibilityNodeData::ATTR_HELP] =
-        ASCIIToUTF16("HelpText");
+    root.AddStringAttribute(AccessibilityNodeData::ATTR_HELP, "HelpText");
     root.child_ids.push_back(1001);
     root.child_ids.push_back(1002);
 
     AccessibilityNodeData child1;
     child1.id = 1001;
-    child1.name = ASCIIToUTF16("Child1");
+    child1.SetName("Child1");
     child1.location.set_width(250);
     child1.location.set_height(100);
     child1.role = AccessibilityNodeData::ROLE_BUTTON;
 
     AccessibilityNodeData child2;
     child2.id = 1002;
     child2.location.set_x(250);
     child2.location.set_width(250);
     child2.location.set_height(100);
     child2.role = AccessibilityNodeData::ROLE_HEADING;
@@ skipping 67 matching lines @@
 
   // Now any attributes we query should return nil.
   EXPECT_EQ(nil, [retainedFirstChild
       accessibilityAttributeValue:NSAccessibilityTitleAttribute]);
 
   // Don't leak memory in the test.
   [retainedFirstChild release];
 }
 
 }  // namespace content