Revert "Mojo: Add BindingsSupportImpl on top of HandleWatcher"

mojo/common/bindings_support_impl.h

-// Copyright 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.
-
-#ifndef MOJO_COMMON_BINDINGS_SUPPORT_IMPL_H_
-#define MOJO_COMMON_BINDINGS_SUPPORT_IMPL_H_
-
-#include "mojo/public/bindings/lib/bindings_support.h"
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "mojo/common/mojo_common_export.h"
-
-namespace mojo {
-namespace common {
-
-class MOJO_COMMON_EXPORT BindingsSupportImpl
-    : NON_EXPORTED_BASE(public BindingsSupport) {
- public:
-  BindingsSupportImpl();
-  virtual ~BindingsSupportImpl();
-
-  // BindingsSupport methods:
-  virtual AsyncWaitID AsyncWait(Handle handle, MojoWaitFlags flags,
-                                AsyncWaitCallback* callback) OVERRIDE;
-  virtual void CancelWait(AsyncWaitID async_wait_id) OVERRIDE;
-
- private:
-  class Context;
-  scoped_refptr<Context> context_;
-
-  DISALLOW_COPY_AND_ASSIGN(BindingsSupportImpl);
-};
-
-}  // namespace common
-}  // namespace mojo
-
-#endif  // MOJO_COMMON_BINDINGS_SUPPORT_IMPL_H_