Make webkitCancelFullScreen() an alias of webkitExitFullscreen()

Source/web/ChromeClientImpl.cpp

Index: Source/web/ChromeClientImpl.cpp
diff --git a/Source/web/ChromeClientImpl.cpp b/Source/web/ChromeClientImpl.cpp
index 637b399993e528252e21c266544d287a2be35077..5c630a0903726bb82827764b04596e0e665ea085 100644
--- a/Source/web/ChromeClientImpl.cpp
+++ b/Source/web/ChromeClientImpl.cpp
@@ -37,7 +37,7 @@
 #include "core/accessibility/AXObject.h"
 #include "core/accessibility/AXObjectCache.h"
 #include "core/dom/Document.h"
-#include "core/dom/DocumentFullscreen.h"
+#include "core/dom/FullscreenElementStack.h"
 #include "core/dom/Node.h"
 #include "core/events/KeyboardEvent.h"
 #include "core/events/MouseEvent.h"
@@ -224,7 +224,7 @@ Page* ChromeClientImpl::createWindow(LocalFrame* frame, const FrameLoadRequest&
         policy = getNavigationPolicy();
 
     ASSERT(frame->document());
-    DocumentFullscreen::webkitCancelFullScreen(*frame->document());
+    FullscreenElementStack::from(*frame->document()).fullyExitFullscreen();
 
     WebViewImpl* newView = toWebViewImpl(
         m_webView->client()->createView(WebLocalFrameImpl::fromFrame(frame), WrappedResourceRequest(r.resourceRequest()), features, r.frameName(), policy, shouldSendReferrer == NeverSendReferrer));