[ScreenOrientation] Merge ScreenOrientation into ScreenOrientationProvider.

content/browser/screen_orientation/screen_orientation.cc

-// 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.
-
-#include "content/browser/screen_orientation/screen_orientation.h"
-
-#include "content/public/browser/navigation_details.h"
-#include "content/public/browser/screen_orientation_provider.h"
-#include "content/public/browser/web_contents.h"
-
-namespace content {
-
-ScreenOrientation::ScreenOrientation(WebContents* web_contents)
-    : WebContentsObserver(web_contents),
-      bindings_(web_contents, this),
-      weak_factory_(this) {
-  provider_.reset(new ScreenOrientationProvider(web_contents));
-}
-
-ScreenOrientation::~ScreenOrientation() = default;
-
-void ScreenOrientation::LockOrientation(
-    blink::WebScreenOrientationLockType orientation,
-    const LockOrientationCallback& callback) {
-  provider_->LockOrientation(orientation, callback);
-}
-
-void ScreenOrientation::UnlockOrientation() {
-  provider_->UnlockOrientation();
-}
-
-void ScreenOrientation::DidNavigateMainFrame(
-    const LoadCommittedDetails& details,
-    const FrameNavigateParams& params) {
-  if (details.is_in_page)
-    return;
-  provider_->UnlockOrientation();
-}
-
-ScreenOrientationProvider* ScreenOrientation::GetScreenOrientationProvider() {
-  return provider_.get();
-}
-
-}  // namespace content