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

chrome/browser/sync/sync_ui_util_unittest.cc

 // 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 <set>
 #include "base/basictypes.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/fake_auth_status_provider.h"
 #include "chrome/browser/signin/fake_signin_manager.h"
@@ skipping 330 matching lines @@
                                   signin,
                                   sync_ui_util::WITH_HTML,
                                   &status_label,
                                   &link_label);
     // If the status and link message combination is already present in the set
     // of messages already seen, this is a duplicate rather than a unique
     // message, and the test has failed.
     EXPECT_FALSE(status_label.empty()) <<
         "Empty status label returned for case #" << idx;
     base::string16 combined_label =
-        status_label + base::string16(ASCIIToUTF16("#")) + link_label;
+        status_label + base::ASCIIToUTF16("#") + link_label;
     EXPECT_TRUE(messages.find(combined_label) == messages.end()) <<
         "Duplicate message for case #" << idx << ": " << combined_label;
     messages.insert(combined_label);
     testing::Mock::VerifyAndClearExpectations(&service);
     testing::Mock::VerifyAndClearExpectations(&signin);
     EXPECT_CALL(service, GetAuthError()).WillRepeatedly(ReturnRef(error));
     provider.reset();
     signin.Shutdown();
   }
 }
@@ skipping 18 matching lines @@
     sync_ui_util::GetStatusLabels(&service,
                                   signin,
                                   sync_ui_util::PLAIN_TEXT,
                                   &status_label,
                                   &link_label);
 
     // Ensures a search for string 'href' (found in links, not a string to be
     // found in an English language message) fails when links are excluded from
     // the status label.
     EXPECT_FALSE(status_label.empty());
-    EXPECT_EQ(status_label.find(base::string16(ASCIIToUTF16("href"))),
+    EXPECT_EQ(status_label.find(base::ASCIIToUTF16("href")),
               base::string16::npos);
     testing::Mock::VerifyAndClearExpectations(&service);
     testing::Mock::VerifyAndClearExpectations(&signin);
     EXPECT_CALL(service, GetAuthError()).WillRepeatedly(ReturnRef(error));
     provider.reset();
     signin.Shutdown();
   }
 }