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

media/audio/audio_parameters_unittest.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 "base/basictypes.h"
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "media/audio/audio_parameters.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 TEST(AudioParameters, Constructor_Default) {
   AudioParameters::Format expected_format = AudioParameters::AUDIO_PCM_LINEAR;
   int expected_bits = 0;
   int expected_channels = 0;
   ChannelLayout expected_channel_layout = CHANNEL_LAYOUT_NONE;
@@ skipping 142 matching lines @@
       SCOPED_TRACE("i=" + base::IntToString(i) + " j=" + base::IntToString(j));
       EXPECT_EQ(i < j, values[i] < values[j]);
     }
 
     // Verify that a value is never less than itself.
     EXPECT_FALSE(values[i] < values[i]);
   }
 }
 
 }  // namespace media