Update uses of UTF conversions in content/ to use the base:: namespace.

content/browser/accessibility/accessibility_tree_formatter_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/accessibility_tree_formatter.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
@@ skipping 153 matching lines @@
 base::string16 AccessibilityTreeFormatter::ToString(
     const base::DictionaryValue& dict,
     const base::string16& indent) {
   base::string16 line;
   NSArray* defaultAttributes =
       [NSArray arrayWithObjects:NSAccessibilityTitleAttribute,
                                 NSAccessibilityValueAttribute,
                                 nil];
   string s_value;
   dict.GetString(SysNSStringToUTF8(NSAccessibilityRoleAttribute), &s_value);
-  WriteAttribute(true, UTF8ToUTF16(s_value), &line);
+  WriteAttribute(true, base::UTF8ToUTF16(s_value), &line);
 
   string subroleAttribute = SysNSStringToUTF8(NSAccessibilitySubroleAttribute);
   if (dict.GetString(subroleAttribute, &s_value)) {
     WriteAttribute(false,
                    StringPrintf("%s=%s",
                                 subroleAttribute.c_str(), s_value.c_str()),
                    &line);
   }
 
   CR_DEFINE_STATIC_LOCAL(NSArray*, all_attributes, (BuildAllAttributesArray()));
@@ skipping 26 matching lines @@
                                      *d_value),
                    &line);
   }
   if (dict.GetDictionary(kSizeDictAttr, &d_value)) {
     WriteAttribute(false,
                    FormatCoordinates(kSizeDictAttr,
                                      kWidthDictAttr, kHeightDictAttr, *d_value),
                    &line);
   }
 
-  return indent + line + ASCIIToUTF16("\n");
+  return indent + line + base::ASCIIToUTF16("\n");
 }
 
 // static
 const base::FilePath::StringType
 AccessibilityTreeFormatter::GetActualFileSuffix() {
   return FILE_PATH_LITERAL("-actual-mac.txt");
 }
 
 // static
 const base::FilePath::StringType
@@ skipping 10 matching lines @@
 const string AccessibilityTreeFormatter::GetAllowString() {
   return "@MAC-ALLOW:";
 }
 
 // static
 const string AccessibilityTreeFormatter::GetDenyString() {
   return "@MAC-DENY:";
 }
 
 }  // namespace content