iwyu: Include stringprintf.h where appropriate, part 3.

remoting/jingle_glue/iq_request_unittest.cc

 // Copyright (c) 2011 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 "base/memory/ref_counted.h"
-#include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "remoting/jingle_glue/iq_request.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
 
 namespace remoting {
 
 TEST(IqRequestTest, MakeIqStanza) {
   const char* kMessageId = "0";
   const char* kNamespace = "chromium:testns";
   const char* kNamespacePrefix = "tes";
   const char* kBodyTag = "test";
   const char* kType = "get";
   const char* kTo = "user@domain.com";
 
   std::string expected_xml_string =
-      StringPrintf(
+      base::StringPrintf(
           "<cli:iq type=\"%s\" to=\"%s\" id=\"%s\" "
           "xmlns:cli=\"jabber:client\">"
           "<%s:%s xmlns:%s=\"%s\"/>"
           "</cli:iq>",
           kType, kTo, kMessageId, kNamespacePrefix, kBodyTag,
           kNamespacePrefix, kNamespace);
 
   buzz::XmlElement* iq_body =
       new buzz::XmlElement(buzz::QName(kNamespace, kBodyTag));
   scoped_ptr<buzz::XmlElement> stanza(
       IqRequest::MakeIqStanza(kType, kTo, iq_body, kMessageId));
 
   EXPECT_EQ(expected_xml_string, stanza->Str());
 }
 
 }  // namespace remoting