[ScreenOrientation] Merge mojo interface ScreenOrientationListener into ScreenOrientation

content/browser/screen_orientation/screen_orientation_listener_android.h

-// Copyright 2014 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 CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_LISTENER_ANDROID_H_
-#define CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_LISTENER_ANDROID_H_
-
-#include "base/macros.h"
-#include "content/public/browser/browser_associated_interface.h"
-#include "content/public/browser/browser_message_filter.h"
-#include "device/screen_orientation/public/interfaces/screen_orientation.mojom.h"
-
-namespace content {
-
-class ScreenOrientationListenerAndroid
-    : public BrowserMessageFilter,
-      public BrowserAssociatedInterface<
-          device::mojom::ScreenOrientationListener>,
-      public NON_EXPORTED_BASE(device::mojom::ScreenOrientationListener) {
- public:
-  ScreenOrientationListenerAndroid();
-
-  // BrowserMessageFilter implementation.
-  bool OnMessageReceived(const IPC::Message& message) override;
-
- private:
-  ~ScreenOrientationListenerAndroid() override;
-
-  // device::mojom::ScreenOrientationListener:
-  void Start() override;
-  void Stop() override;
-
-  int listeners_count_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScreenOrientationListenerAndroid);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_SCREEN_ORIENTATION_SCREEN_ORIENTATION_LISTENER_ANDROID_H_