[Cleanup] Remove StringPrintf from global namespace

content/renderer/media/media_stream_impl.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 "content/renderer/media/media_stream_impl.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
@@ skipping 66 matching lines @@
 // |devices| from the MediaStreamDispatcher.
 void CreateWebKitSourceVector(
     const std::string& label,
     const StreamDeviceInfoArray& devices,
     WebKit::WebMediaStreamSource::Type type,
     WebKit::WebVector<WebKit::WebMediaStreamSource>& webkit_sources) {
   CHECK_EQ(devices.size(), webkit_sources.size());
   for (size_t i = 0; i < devices.size(); ++i) {
     const char* track_type =
         (type == WebKit::WebMediaStreamSource::TypeAudio) ? "a" : "v";
-    std::string source_id = StringPrintf("%s%s%u", label.c_str(),
-                                         track_type,
-                                         static_cast<unsigned int>(i));
+    std::string source_id = base::StringPrintf("%s%s%u", label.c_str(),
+                                               track_type,
+                                               static_cast<unsigned int>(i));
     webkit_sources[i].initialize(
           UTF8ToUTF16(source_id),
           type,
           UTF8ToUTF16(devices[i].device.name));
     webkit_sources[i].setExtraData(
         new content::MediaStreamSourceExtraData(devices[i]));
     webkit_sources[i].setDeviceId(UTF8ToUTF16(devices[i].device.id.c_str()));
   }
 }
 
@@ skipping 489 matching lines @@
     const StreamStopCallback& stop_callback) {
   stream_stop_callback_ = stop_callback;
 }
 
 void MediaStreamExtraData::OnLocalStreamStop() {
   if (!stream_stop_callback_.is_null())
     stream_stop_callback_.Run(stream_->label());
 }
 
 }  // namespace content