[Cleanup] Remove StringPrintf from global namespace

chrome_frame/test/navigation_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/file_util.h"
 #include "base/test/test_file_util.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/windows_version.h"
@@ skipping 863 matching lines @@
  public:
   HttpHeaderTest() {}
 
   void HeaderTestWithData(const char* content_type, const char* data) {
     const wchar_t* relative_url = L"/header_test";
     const char* kHeaderFormat =
         "HTTP/1.1 200 OK\r\n"
         "Connection: close\r\n"
         "Content-Type: %s\r\n"
         "X-UA-Compatible: chrome=1\r\n";
-    std::string header = StringPrintf(kHeaderFormat, content_type);
+    std::string header = base::StringPrintf(kHeaderFormat, content_type);
     std::wstring url = server_mock_.Resolve(relative_url);
     EXPECT_CALL(server_mock_, Get(_, StrEq(relative_url), _))
         .WillRepeatedly(SendFast(header, data));
 
     InSequence expect_in_sequence_for_scope;
 
     ie_mock_.ExpectNavigation(IN_CF, url);
     EXPECT_CALL(ie_mock_, OnLoad(IN_CF, StrEq(url)))
         .WillOnce(CloseBrowserMock(&ie_mock_));
 
@@ skipping 387 matching lines @@
       .WillOnce(CloseBrowserMock(
           &no_referrer_target_opener_window_mock));
 
   EXPECT_CALL(no_referrer_target_opener_window_mock, OnQuit())
       .WillOnce(CloseBrowserMock(&ie_mock_));
 
   LaunchIENavigateAndLoop(initial_url, kChromeFrameVeryLongNavigationTimeout);
 }
 
 }  // namespace chrome_frame_test