Implement 'window.isSecureContext'.

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

Index: third_party/WebKit/Source/core/dom/Fullscreen.cpp
diff --git a/third_party/WebKit/Source/core/dom/Fullscreen.cpp b/third_party/WebKit/Source/core/dom/Fullscreen.cpp
index 110dec35632e5025f4c97611f0e4d89f4a900b58..f4ea213cc22fa3b62ef2422afd9711f69c220aa5 100644
--- a/third_party/WebKit/Source/core/dom/Fullscreen.cpp
+++ b/third_party/WebKit/Source/core/dom/Fullscreen.cpp
@@ -200,11 +200,11 @@ void Fullscreen::documentWasDisposed()
 
 void Fullscreen::requestFullscreen(Element& element, RequestType requestType)
 {
-    // It is required by isPrivilegedContext() but isn't
+    // It is required by isSecureContext() but isn't
     // actually used. This could be used later if a warning is shown in the
     // developer console.
     String errorMessage;
-    if (document()->isPrivilegedContext(errorMessage)) {
+    if (document()->isSecureContext(errorMessage)) {
         UseCounter::count(document(), UseCounter::FullscreenSecureOrigin);
     } else {
         UseCounter::count(document(), UseCounter::FullscreenInsecureOrigin);