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

third_party/WebKit/Source/core/dom/Fullscreen.h

Index: third_party/WebKit/Source/core/dom/Fullscreen.h
diff --git a/third_party/WebKit/Source/core/dom/Fullscreen.h b/third_party/WebKit/Source/core/dom/Fullscreen.h
index 566e697617702bdb57ea43bc119950675185dec2..b67a4a9490d39a4ee93dbc998fe41baf38ab94ae 100644
--- a/third_party/WebKit/Source/core/dom/Fullscreen.h
+++ b/third_party/WebKit/Source/core/dom/Fullscreen.h
@@ -67,9 +67,10 @@ public:
         PrefixedRequest,
     };
 
-    // |forCrossProcessAncestor| is used in OOPIF scenarios and is set to true
-    // when fullscreen is requested for an out-of-process descendant element.
-    void requestFullscreen(Element&, RequestType, bool forCrossProcessAncestor = false);
+    // |forCrossProcessDescendant| is used in OOPIF scenarios and is set to
+    // true when fullscreen is requested for an out-of-process descendant
+    // element.
+    void requestFullscreen(Element&, RequestType, bool forCrossProcessDescendant = false);
 
     static void fullyExitFullscreen(Document&);
     void exitFullscreen();
@@ -77,12 +78,6 @@ public:
     static bool fullscreenEnabled(Document&);
     Element* fullscreenElement() const { return !m_fullScreenElementStack.isEmpty() ? m_fullScreenElementStack.last().first.get() : 0; }
 
-    // |isAncestorOfFullscreenElement| is used in OOPIF scenarios and is set to
-    // true when these functions are called to enter/exit fullscreen for an
-    // out-of-process descendant element.  In this case, we enter fullscreen
-    // for its (local) iframe container and make sure to also set the
-    // ContainsFullScreenElement flag on it (so that it gains the
-    // -webkit-full-screen-ancestor style).
     void didEnterFullscreenForElement(Element*);
     void didExitFullscreen();
 
@@ -93,8 +88,9 @@ public:
     void elementRemoved(Element&);
 
     // Returns true if the current fullscreen element stack corresponds to a
-    // container for an actual fullscreen element in an out-of-process iframe.
-    bool forCrossProcessAncestor() { return m_forCrossProcessAncestor; }
+    // container for an actual fullscreen element in a descendant
+    // out-of-process iframe.
+    bool forCrossProcessDescendant() { return m_forCrossProcessDescendant; }
 
     // Mozilla API
     Element* webkitCurrentFullScreenElement() const { return m_fullScreenElement.get(); }
@@ -136,7 +132,7 @@ private:
     // change if https://crbug.com/161068 is fixed so that cross-process
     // postMessage can carry user gestures.  If that happens, this should be
     // moved to be part of |m_fullScreenElementStack|.
-    bool m_forCrossProcessAncestor;
+    bool m_forCrossProcessDescendant;
 };
 
 inline bool Fullscreen::isActiveFullScreenElement(const Element& element)