Allow going fullscreen during a screen orientation change handler.

third_party/WebKit/Source/modules/screen_orientation/ScreenOrientationController.cpp

 // 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 "modules/screen_orientation/ScreenOrientationController.h"
 
 #include "core/events/Event.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/Page.h"
 #include "modules/screen_orientation/ScreenOrientation.h"
 #include "modules/screen_orientation/ScreenOrientationDispatcher.h"
 #include "platform/LayoutTestSupport.h"
+#include "platform/ScopedOrientationChangeIndicator.h"
 #include "public/platform/WebScreenInfo.h"
 #include "public/platform/modules/screen_orientation/WebScreenOrientationClient.h"
 
 namespace blink {
 
 ScreenOrientationController::~ScreenOrientationController()
 {
 }
 
 void ScreenOrientationController::provideTo(LocalFrame& frame, WebScreenOrientationClient* client)
@@ skipping 141 matching lines @@
     // When detached, the client is no longer valid.
     if (!m_client)
         return;
     m_client->unlockOrientation();
 }
 
 void ScreenOrientationController::dispatchEventTimerFired(Timer<ScreenOrientationController>*)
 {
     if (!m_orientation)
         return;
+
+    ScopedOrientationChangeIndicator orientationChangeIndicator;
     m_orientation->dispatchEvent(Event::create(EventTypeNames::change));
 }
 
 void ScreenOrientationController::didUpdateData()
 {
     // Do nothing.
 }
 
 void ScreenOrientationController::registerWithDispatcher()
 {
@@ skipping 26 matching lines @@
 
 DEFINE_TRACE(ScreenOrientationController)
 {
     visitor->trace(m_orientation);
     LocalFrameLifecycleObserver::trace(visitor);
     Supplement<LocalFrame>::trace(visitor);
     PlatformEventController::trace(visitor);
 }
 
 } // namespace blink