Move UIEvent.pageX/pageY/layerX/layerY to MouseEvent

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 c6fdb14c988830159e3340ad651fbac85067ceb9..14dbb011d3f506e51c988efc4b3a6b28a104ecce 100644
--- a/Source/core/frame/UseCounter.h
+++ b/Source/core/frame/UseCounter.h
@@ -433,10 +433,6 @@ public:
         RequestFileSystem = 508,
         RequestFileSystemWorker = 509,
         RequestFileSystemSyncWorker = 510,
-        UIEventLayerX = 511,
-        UIEventLayerY = 512,
-        UIEventPageX = 513,
-        UIEventPageY = 514,
         DevToolsConsoleProfile = 518,
         SVGStyleElementTitle = 519,
         PictureSourceSrc = 520,
@@ -747,6 +743,8 @@ public:
         FormDataAppendNull = 843,
         HTMLDocumentCreateAttributeNameNotLowercase = 844,
         NonHTMLElementSetAttributeNodeFromHTMLDocumentNameNotLowercase = 845,
+        MouseEventLayerX = 846,
+        MouseEventLayerY = 847,
 
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.