Remove unused thread.h include in trace_event_impl.h and fix IWUU.

cc/trees/remote_channel_impl.h

 // Copyright 2016 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 CC_TREES_REMOTE_CHANNEL_IMPL_H_
 #define CC_TREES_REMOTE_CHANNEL_IMPL_H_
 
+#include <queue>
+
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/completion_event.h"
 #include "cc/proto/compositor_message_to_impl.pb.h"
 #include "cc/trees/channel_impl.h"
 #include "cc/trees/proxy.h"
 #include "cc/trees/proxy_impl.h"
 #include "cc/trees/remote_proto_channel.h"
 
@@ skipping 179 matching lines @@
   CompositorThreadOnly compositor_thread_vars_unsafe_;
 
   base::WeakPtr<ProxyImpl> proxy_impl_weak_ptr_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteChannelImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_REMOTE_CHANNEL_IMPL_H_