Revert "Refactor code listening to platform events in content/renderer/."

content/renderer/screen_orientation/screen_orientation_observer.cc

Index: content/renderer/screen_orientation/screen_orientation_observer.cc
diff --git a/content/renderer/screen_orientation/screen_orientation_observer.cc b/content/renderer/screen_orientation/screen_orientation_observer.cc
deleted file mode 100644
index e3fc407ed1331b8b5ef3d2017c0530b727f5673d..0000000000000000000000000000000000000000
--- a/content/renderer/screen_orientation/screen_orientation_observer.cc
+++ /dev/null
@@ -1,29 +0,0 @@
-// 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.
-
-#include "content/renderer/screen_orientation/screen_orientation_observer.h"
-
-#include "content/common/screen_orientation_messages.h"
-
-namespace content {
-
-ScreenOrientationObserver::ScreenOrientationObserver() {
-}
-
-void ScreenOrientationObserver::Start(
-    blink::WebPlatformEventListener* listener) {
-  // This should never be called with a proper listener.
-  CHECK(listener == 0);
-  PlatformEventObserver<blink::WebPlatformEventListener>::Start(0);
-}
-
-void ScreenOrientationObserver::SendStartMessage() {
-  RenderThread::Get()->Send(new ScreenOrientationHostMsg_StartListening());
-}
-
-void ScreenOrientationObserver::SendStopMessage() {
-  RenderThread::Get()->Send(new ScreenOrientationHostMsg_StopListening());
-}
-
-} // namespace content