Centralize ScreenOrientationProvider logic, add platform delegates

content/browser/screen_orientation/screen_orientation_delegate_android.cc

+// 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/browser/screen_orientation/screen_orientation_delegate_android.h"
+
+#include "content/browser/android/content_view_core_impl.h"
+#include "jni/ScreenOrientationProvider_jni.h"
+
+namespace content {
+
+ScreenOrientationDelegateAndroid::ScreenOrientationDelegateAndroid() {
+}
+
+ScreenOrientationDelegateAndroid::~ScreenOrientationDelegateAndroid() {
+}
+
+// static
+bool ScreenOrientationDelegateAndroid::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+// static
+void ScreenOrientationDelegateAndroid::StartAccurateListening() {
+  Java_ScreenOrientationProvider_startAccurateListening(
+      base::android::AttachCurrentThread());
+}
+
+// static
+void ScreenOrientationDelegateAndroid::StopAccurateListening() {
+  Java_ScreenOrientationProvider_stopAccurateListening(
+      base::android::AttachCurrentThread());
+}
+
+bool ScreenOrientationDelegateAndroid::FullScreenRequired(
+    WebContents* web_contents) {
+  ContentViewCoreImpl* cvc =
+      ContentViewCoreImpl::FromWebContents(web_contents);
+  bool fullscreen_required = cvc ? cvc->IsFullscreenRequiredForOrientationLock()
+                                 : true;
+  return fullscreen_required;
+}
+
+void ScreenOrientationDelegateAndroid::Lock(
+    blink::WebScreenOrientationLockType lock_orientation) {
+  Java_ScreenOrientationProvider_lockOrientation(
+      base::android::AttachCurrentThread(), lock_orientation);
+}
+
+bool ScreenOrientationDelegateAndroid::ScreenOrientationProviderSupported() {
+  // Always supported on Android
+  return true;
+}
+
+void ScreenOrientationDelegateAndroid::Unlock() {
+  Java_ScreenOrientationProvider_unlockOrientation(
+      base::android::AttachCurrentThread());
+}
+
+} // namespace content