Sync core/timing/ interfaces with their specs, or lack thereof

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 2fee4e81b18eaeba5f361037b7552a869eac04cd..9c587241fa0642f9c04688c264daaeec9e502e4d 100644
--- a/Source/core/frame/UseCounter.h
+++ b/Source/core/frame/UseCounter.h
@@ -771,6 +771,15 @@ public:
         V8UIEvent_InitUIEvent_Method = 873,
         V8Document_CreateTouch_Method = 874,
         V8HTMLFrameElement_GetSVGDocument_Method = 875,
+        V8Console_Memory_AttributeGetter = 876,
+        V8Console_Memory_AttributeSetter = 877,
+        V8MemoryInfo_TotalJSHeapSize_AttributeGetter = 878,
+        V8MemoryInfo_UsedJSHeapSize_AttributeGetter = 879,
+        V8MemoryInfo_JSHeapSizeLimit_AttributeGetter = 880,
+        V8Performance_Timing_AttributeGetter = 881,
+        V8Performance_Navigation_AttributeGetter = 882,
+        V8Performance_Memory_AttributeGetter = 883,
+        V8SharedWorker_WorkerStart_AttributeGetter = 884,
 
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.