Remove unused UseCounter features

Source/core/frame/UseCounter.h

Index: Source/core/frame/UseCounter.h
diff --git a/Source/core/frame/UseCounter.h b/Source/core/frame/UseCounter.h
index 7e1b7da1db78a85cf3ec7b936b5569bf3cb73bde..695cd2f75ef75b7ff5ab10580536c98c813b0f31 100644
--- a/Source/core/frame/UseCounter.h
+++ b/Source/core/frame/UseCounter.h
@@ -206,7 +206,6 @@ public:
         InputTypeTextMaxLength = 191,
         InputTypePassword = 192,
         InputTypePasswordMaxLength = 193,
-        SVGInstanceRoot = 194,
         ShowModalDialog = 195,
         PrefixedPageVisibility = 196,
         CSSStyleSheetInsertRuleOptionalArg = 198, // Inconsistent with the specification and other browsers.
@@ -263,14 +262,9 @@ public:
         DeprecatedWebKitRepeatingRadialGradient = 264,
         PrefixedImageSmoothingEnabled = 267,
         UnprefixedImageSmoothingEnabled = 268,
-        PromiseConstructor = 270,
-        PromiseCast = 271,
-        PromiseReject = 272,
-        PromiseResolve = 273,
         // The above items are available in M34 branch.
 
         TextAutosizing = 274,
-        TextAutosizingLayout = 275,
         HTMLAnchorElementPingAttribute = 276,
         InsertAdjacentHTML = 278,
         SVGClassName = 279,
@@ -321,7 +315,6 @@ public:
         // The above items are available in M35 branch.
 
         SVGForeignObjectElement = 325,
-        PrefixedElementRequestPointerLock = 326,
         SelectionSetPosition = 327,
         AnimationPlayerFinishEvent = 328,
         SVGSVGElementInXMLDocument = 329,
@@ -354,8 +347,6 @@ public:
         WindowOffscreenBuffering = 356,
         WindowDefaultStatus = 357,
         WindowDefaultstatus = 358,
-        PrefixedConvertPointFromPageToNode = 359,
-        PrefixedConvertPointFromNodeToPage = 360,
         PrefixedTransitionEventConstructor = 361,
         PrefixedMutationObserverConstructor = 362,
         PrefixedIDBCursorConstructor = 363,
@@ -370,8 +361,6 @@ public:
         RangeDetach = 372,
         HTMLTableElementVspace = 374,
         HTMLTableElementHspace = 375,
-        PrefixedDocumentExitPointerLock = 376,
-        PrefixedDocumentPointerLockElement = 377,
         PrefixedTouchRadiusX = 378,
         PrefixedTouchRadiusY = 379,
         PrefixedTouchRotationAngle = 380,
@@ -418,11 +407,10 @@ public:
         TextEncoderConstructor = 429,
         TextEncoderEncode = 430,
         TextDecoderConstructor = 431,
-        TextDecoderDecode= 432,
+        TextDecoderDecode = 432,
         FocusInOutEvent = 433,
         MouseEventMovementX = 434,
         MouseEventMovementY = 435,
-        MixedContentTextTrack = 436,
         MixedContentRaw = 437,
         MixedContentImage = 438,
         MixedContentMedia = 439,
@@ -431,7 +419,7 @@ public:
         FormsSubmitted = 442,
         TextInputEventOnInput = 443,
         TextInputEventOnTextArea = 444,
-        TextInputEventOnContentEditable= 445,
+        TextInputEventOnContentEditable = 445,
         TextInputEventOnNotNode = 446,
         WebkitBeforeTextInsertedOnInput = 447,
         WebkitBeforeTextInsertedOnTextArea = 448,