Clean up some OOPIF-related naming and comments in Fullscreen.

third_party/WebKit/Source/web/FullscreenController.cpp

Index: third_party/WebKit/Source/web/FullscreenController.cpp
diff --git a/third_party/WebKit/Source/web/FullscreenController.cpp b/third_party/WebKit/Source/web/FullscreenController.cpp
index 6e143691a96d5526b41ca1c14d4750c2d4a0dc0d..0b506896f046d519abcab5fe8dbf9e31e5dcbf0e 100644
--- a/third_party/WebKit/Source/web/FullscreenController.cpp
+++ b/third_party/WebKit/Source/web/FullscreenController.cpp
@@ -156,7 +156,7 @@ void FullscreenController::enterFullScreenForElement(Element* element)
     // We need to transition to fullscreen mode.
     WebLocalFrameImpl* frame = WebLocalFrameImpl::fromFrame(element->document().frame());
     if (frame && frame->client()) {
-        if (!Fullscreen::from(element->document()).forCrossProcessAncestor())
+        if (!Fullscreen::from(element->document()).forCrossProcessDescendant())
             frame->client()->enterFullscreen();
         m_provisionalFullScreenElement = element;
     }