IPC: Delete thread-safe send support

ipc/ipc_sync_channel_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 "ipc/ipc_sync_channel.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 973 matching lines @@
 }
 
 //------------------------------------------------------------------------------
 
 class TestSyncMessageFilter : public SyncMessageFilter {
  public:
   TestSyncMessageFilter(
       base::WaitableEvent* shutdown_event,
       Worker* worker,
       scoped_refptr<base::SingleThreadTaskRunner> task_runner)
-      : SyncMessageFilter(shutdown_event, false),
+      : SyncMessageFilter(shutdown_event),
         worker_(worker),
         task_runner_(task_runner) {}
 
   void OnFilterAdded(Sender* sender) override {
     SyncMessageFilter::OnFilterAdded(sender);
     task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&TestSyncMessageFilter::SendMessageOnHelperThread, this));
   }
 
@@ skipping 856 matching lines @@
 }
 
 // Windows needs to send an out-of-band secret to verify the client end of the
 // channel. Test that we still connect correctly in that case.
 TEST_F(IPCSyncChannelTest, Verified) {
   Verified();
 }
 
 }  // namespace
 }  // namespace IPC