Add base:: to string16 in chrome_frame/.

chrome_frame/test/delete_chrome_history_test.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 <string>
 
 #include "base/rand_util.h"
 #include "chrome/common/url_constants.h"
 #include "chrome_frame/test/mock_ie_event_sink_actions.h"
 #include "chrome_frame/test/mock_ie_event_sink_test.h"
@@ skipping 91 matching lines @@
   base::FilePath profile_path(
       root_path.Append(L"Default").Append(kWebDataFilename));
 
   autofill::AutofillTable autofill_table("en-US");
   WebDatabase web_database;
   web_database.AddTable(&autofill_table);
   sql::InitStatus init_status = web_database.Init(profile_path);
   EXPECT_EQ(sql::INIT_OK, init_status);
 
   if (init_status == sql::INIT_OK) {
-    std::vector<string16> values;
+    std::vector<base::string16> values;
     autofill_table.GetFormValuesForElementName(
         element_name, L"", &values, 9999);
     EXPECT_THAT(values, matcher);
   }
 }
 
 // Launch |ie_mock| and navigate it to |url|.
 ACTION_P2(LaunchThisIEAndNavigate, ie_mock, url) {
   EXPECT_HRESULT_SUCCEEDED(ie_mock->event_sink()->LaunchIEAndNavigate(url,
                                                                       ie_mock));
@@ skipping 203 matching lines @@
 
   // Start it up. Everything else is triggered as mock actions.
   ASSERT_HRESULT_SUCCEEDED(
       ie_mock_.event_sink()->LaunchIEAndNavigate(top_url, &ie_mock_));
 
   // 3 navigations + 2 invocations of delete browser history == 5
   loop_.RunFor(kChromeFrameLongNavigationTimeout * 5);
 }
 
 }  // namespace chrome_frame_test