Revert of Sync requestFullscreen() and exitFullscreen() algorithms with the spec

third_party/WebKit/Source/web/WebRemoteFrameImpl.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 "web/WebRemoteFrameImpl.h"
 
 #include "core/dom/Fullscreen.h"
 #include "core/dom/RemoteSecurityContext.h"
 #include "core/dom/SecurityContext.h"
 #include "core/frame/FrameView.h"
@@ skipping 488 matching lines @@
     return false;
   return owner->layoutObject()->style()->pointerEvents() ==
          EPointerEvents::kNone;
 }
 
 void WebRemoteFrameImpl::willEnterFullscreen() {
   // This should only ever be called when the FrameOwner is local.
   HTMLFrameOwnerElement* ownerElement =
       toHTMLFrameOwnerElement(frame()->owner());
 
-  // Call |requestFullscreen()| on |ownerElement| to make it the pending
-  // fullscreen element in anticipation of the coming |didEnterFullscreen()|
-  // call.
+  // Call requestFullscreen() on |ownerElement| to make it the provisional
+  // fullscreen element in FullscreenController, and to prepare
+  // fullscreenchange events that will need to fire on it and its (local)
+  // ancestors. The events will be triggered if/when fullscreen is entered.
   //
-  // PrefixedForCrossProcessDescendant is necessary because:
-  //  - The fullscreen element ready check and other checks should be bypassed.
-  //  - |ownerElement| will need :-webkit-full-screen-ancestor style in addition
-  //    to :-webkit-full-screen.
+  // Passing |forCrossProcessAncestor| to requestFullscreen is necessary
+  // because:
+  // - |ownerElement| will need :-webkit-full-screen-ancestor style in
+  //   addition to :-webkit-full-screen.
+  // - there's no need to resend the ToggleFullscreen IPC to the browser
+  //   process.
   //
   // TODO(alexmos): currently, this assumes prefixed requests, but in the
   // future, this should plumb in information about which request type
   // (prefixed or unprefixed) to use for firing fullscreen events.
-  Fullscreen::requestFullscreen(
-      *ownerElement,
-      Fullscreen::RequestType::PrefixedForCrossProcessDescendant);
+  Fullscreen::requestFullscreen(*ownerElement,
+                                Fullscreen::RequestType::Prefixed,
+                                true /* forCrossProcessAncestor */);
 }
 
 void WebRemoteFrameImpl::setHasReceivedUserGesture() {
   frame()->setDocumentHasReceivedUserGesture();
 }
 
 WebRemoteFrameImpl::WebRemoteFrameImpl(WebTreeScopeType scope,
                                        WebRemoteFrameClient* client)
     : WebRemoteFrame(scope),
       m_frameClient(RemoteFrameClientImpl::create(this)),
       m_client(client),
       m_selfKeepAlive(this) {}
 
 }  // namespace blink