Cleanup: Remove unneeded browser_thread.h includes in content/.

content/browser/streams/stream_context.cc

 // Copyright (c) 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.
 
 #include "content/browser/streams/stream_context.h"
 
 #include "base/bind.h"
 #include "content/browser/streams/stream_registry.h"
 #include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_thread.h"
 
 using base::UserDataAdapter;
 
 namespace {
 const char* kStreamContextKeyName = "content_stream_context";
 }
 
 namespace content {
 
 StreamContext::StreamContext() {}
@@ skipping 28 matching lines @@
   // tests.
   if (BrowserThread::IsMessageLoopValid(BrowserThread::IO) &&
       !BrowserThread::CurrentlyOn(BrowserThread::IO)) {
     BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, this);
     return;
   }
   delete this;
 }
 
 }  // namespace content