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

media/filters/pipeline_integration_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 "media/filters/pipeline_integration_test_base.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "build/build_config.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/media_keys.h"
 #include "media/base/test_data_util.h"
 #include "media/crypto/aes_decryptor.h"
 #include "media/filters/chunk_demuxer.h"
 
 using testing::AtMost;
 
 namespace media {
@@ skipping 946 matching lines @@
 
 // Verify that VP8 video with inband text track can be played back.
 TEST_F(PipelineIntegrationTest, BasicPlayback_VP8_WebVTT_WebM) {
   ASSERT_TRUE(Start(GetTestDataFilePath("bear-vp8-webvtt.webm"),
                     PIPELINE_OK));
   Play();
   ASSERT_TRUE(WaitUntilOnEnded());
 }
 
 }  // namespace media