Rename ExceptionCode constants to use the names in the spec (2/3)

Source/core/html/HTMLVideoElement.cpp

Index: Source/core/html/HTMLVideoElement.cpp
diff --git a/Source/core/html/HTMLVideoElement.cpp b/Source/core/html/HTMLVideoElement.cpp
index 83eb6fe37e79ff2a71a72f7914f7b5b83b166a22..bbdf46bf1c6aa4120558e8cd1efb7bf213c3d43c 100644
--- a/Source/core/html/HTMLVideoElement.cpp
+++ b/Source/core/html/HTMLVideoElement.cpp
@@ -227,7 +227,7 @@ void HTMLVideoElement::webkitEnterFullscreen(ExceptionCode& ec)
     // Generate an exception if this isn't called in response to a user gesture, or if the 
     // element does not support fullscreen.
     if ((userGestureRequiredForFullscreen() && !ScriptController::processingUserGesture()) || !supportsFullscreen()) {
-        ec = INVALID_STATE_ERR;
+        ec = InvalidStateError;
         return;
     }