Rewrite references to "wtf/" to "platform/wtf/" in platform/audio.

third_party/WebKit/Source/platform/audio/PushPullFIFO.h

 // Copyright 2017 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.
 
 #ifndef PushPullFIFO_h
 #define PushPullFIFO_h
 
 #include "platform/audio/AudioBus.h"
+#include "platform/wtf/Allocator.h"
 #include "public/platform/WebCommon.h"
-#include "wtf/Allocator.h"
 
 namespace blink {
 
 // A configuration data container for PushPullFIFO unit test.
 struct PushPullFIFOStateForTest {
   const size_t fifoLength;
   const unsigned numberOfChannels;
   const size_t framesAvailable;
   const size_t indexRead;
   const size_t indexWrite;
@@ skipping 55 matching lines @@
   size_t m_indexRead;
   size_t m_indexWrite;
 
   unsigned m_overflowCount;
   unsigned m_underflowCount;
 };
 
 }  // namespace blink
 
 #endif  // PushPullFIFO_h