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

chrome/common/importer/ie_importer_test_registry_overrider_win.cc

 // Copyright (c) 2013 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 "chrome/common/importer/ie_importer_test_registry_overrider_win.h"
 
 #include <windows.h>
 
 #include <string>
 
@@ skipping 12 matching lines @@
     "IE_IMPORTER_TEST_OVERRIDE_HKCU";
 
 // Reads the environment variable set by a previous call to
 // SetTestRegistryOverride() into |key| if it exists and |key| is not NULL.
 // Returns true if the variable was successfully read.
 bool GetTestKeyFromEnvironment(base::string16* key) {
   scoped_ptr<base::Environment> env(base::Environment::Create());
   std::string value;
   bool result = env->GetVar(kTestHKCUOverrideEnvironmentVariable, &value);
   if (result)
-    *key = UTF8ToUTF16(value);
+    *key = base::UTF8ToUTF16(value);
   return result;
 }
 
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // IEImporterTestRegistryOverrider, public:
 
 IEImporterTestRegistryOverrider::IEImporterTestRegistryOverrider()
     : temporary_key_(kTestHKCUOverrideKeyPrefix +
-                     UTF8ToUTF16(base::GenerateGUID())) {
+                     base::UTF8ToUTF16(base::GenerateGUID())) {
   DCHECK(!GetTestKeyFromEnvironment(NULL));
 
   scoped_ptr<base::Environment> env(base::Environment::Create());
   bool success = env->SetVar(kTestHKCUOverrideEnvironmentVariable,
-                             UTF16ToUTF8(temporary_key_));
+                             base::UTF16ToUTF8(temporary_key_));
   DCHECK(success);
 }
 
 IEImporterTestRegistryOverrider::~IEImporterTestRegistryOverrider() {
   base::win::RegKey reg_key(HKEY_CURRENT_USER, temporary_key_.c_str(),
                             KEY_ALL_ACCESS);
   DCHECK(reg_key.Valid());
   reg_key.DeleteKey(L"");
 
   scoped_ptr<base::Environment> env(base::Environment::Create());
   bool success = env->UnSetVar(kTestHKCUOverrideEnvironmentVariable);
   DCHECK(success);
 }
 
 // static
 base::string16 IEImporterTestRegistryOverrider::GetTestRegistryOverride() {
   base::string16 key;
   if (!GetTestKeyFromEnvironment(&key))
     return base::string16();
   return key;
 }