Use Mojo pipes to signal sync IPC events

mojo/public/cpp/bindings/lib/sync_handle_watcher.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 MOJO_PUBLIC_CPP_BINDINGS_LIB_SYNC_HANDLE_WATCHER_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_SYNC_HANDLE_WATCHER_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_checker.h"
-#include "mojo/public/cpp/bindings/lib/sync_handle_registry.h"
+#include "mojo/public/cpp/bindings/sync_handle_registry.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
 namespace internal {
 
 // SyncHandleWatcher supports watching a handle synchronously. It also supports
 // registering the handle with a thread-local storage (SyncHandleRegistry), so
 // that when other SyncHandleWatcher instances on the same thread perform sync
 // handle watching, this handle will be watched together.
 //
@@ skipping 45 matching lines @@
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncHandleWatcher);
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_SYNC_HANDLE_WATCHER_H_