Rename FullscreenElementStack to just Fullscreen

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
diff --git a/Source/core/page/EventHandler.cpp b/Source/core/page/EventHandler.cpp
index 1ee1f595366bd5a13f544451af9c91c8c74a042f..6b29facf87127577991879a6ace097e9a44ff59f 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -35,7 +35,7 @@
 #include "core/clipboard/DataTransfer.h"
 #include "core/dom/Document.h"
 #include "core/dom/DocumentMarkerController.h"
-#include "core/dom/FullscreenElementStack.h"
+#include "core/dom/Fullscreen.h"
 #include "core/dom/NodeRenderingTraversal.h"
 #include "core/dom/TouchList.h"
 #include "core/dom/shadow/ShadowRoot.h"
@@ -2944,7 +2944,7 @@ bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt)
     return true;
 }
 
-bool EventHandler::isKeyEventAllowedInFullScreen(FullscreenElementStack* fullscreen, const PlatformKeyboardEvent& keyEvent) const
+bool EventHandler::isKeyEventAllowedInFullScreen(Fullscreen* fullscreen, const PlatformKeyboardEvent& keyEvent) const
 {
     if (fullscreen->webkitFullScreenKeyboardInputAllowed())
         return true;
@@ -2968,7 +2968,7 @@ bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent)
     RefPtr<FrameView> protector(m_frame->view());
 
     ASSERT(m_frame->document());
-    if (FullscreenElementStack* fullscreen = FullscreenElementStack::fromIfExists(*m_frame->document())) {
+    if (Fullscreen* fullscreen = Fullscreen::fromIfExists(*m_frame->document())) {
         if (fullscreen->webkitIsFullScreen() && !isKeyEventAllowedInFullScreen(fullscreen, initialKeyEvent)) {
             UseCounter::count(*m_frame->document(), UseCounter::KeyEventNotAllowedInFullScreen);
             return false;