Use a direct include of strings headers in ipc/, jingle/, media/.

media/base/audio_hash.cc

 // Copyright 2013 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.
 
 // MSVC++ requires this to be set before any other includes to get M_PI.
 #define _USE_MATH_DEFINES
 #include <cmath>
 
 #include "media/base/audio_hash.h"
 
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "media/base/audio_bus.h"
 
 namespace media {
 
 AudioHash::AudioHash()
     : audio_hash_(),
       sample_count_(0) {
   COMPILE_ASSERT(arraysize(audio_hash_) == kHashBuckets, audio_hash_size_error);
 }
 
@@ skipping 22 matching lines @@
 }
 
 std::string AudioHash::ToString() const {
   std::string result;
   for (size_t i = 0; i < arraysize(audio_hash_); ++i)
     result += base::StringPrintf("%.2f,", audio_hash_[i]);
   return result;
 }
 
 }  // namespace media