[ScreenOrientation] Hide ScreenOrientationProvider inside WebContentsImpl.

ash/content/screen_orientation_delegate_chromeos.cc

 // Copyright 2015 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 "ash/content/screen_orientation_delegate_chromeos.h"
 
 #include "ash/common/wm_window.h"
 #include "ash/display/screen_orientation_controller_chromeos.h"
 #include "ash/shell.h"
-#include "content/public/browser/screen_orientation_provider.h"
 #include "content/public/browser/web_contents.h"
 
 namespace ash {
 
 ScreenOrientationDelegateChromeos::ScreenOrientationDelegateChromeos() {
-  content::ScreenOrientationProvider::SetDelegate(this);
+  content::WebContents::SetScreenOrientationDelegate(this);
 }
 
 ScreenOrientationDelegateChromeos::~ScreenOrientationDelegateChromeos() {
-  content::ScreenOrientationProvider::SetDelegate(nullptr);
+  content::WebContents::SetScreenOrientationDelegate(nullptr);
 }
 
 bool ScreenOrientationDelegateChromeos::FullScreenRequired(
     content::WebContents* web_contents) {
   return true;
 }
 
 void ScreenOrientationDelegateChromeos::Lock(
     content::WebContents* web_contents,
     blink::WebScreenOrientationLockType lock_orientation) {
@@ skipping 11 matching lines @@
 
 void ScreenOrientationDelegateChromeos::Unlock(
     content::WebContents* web_contents) {
   Shell::GetInstance()
       ->screen_orientation_controller()
       ->UnlockOrientationForWindow(
           WmWindow::Get(web_contents->GetNativeView()));
 }
 
 }  // namespace ash