[webnfc] Add an UMA histogram values for WebNFC API calls

third_party/WebKit/Source/core/frame/UseCounter.h

Index: third_party/WebKit/Source/core/frame/UseCounter.h
diff --git a/third_party/WebKit/Source/core/frame/UseCounter.h b/third_party/WebKit/Source/core/frame/UseCounter.h
index 146dca4af0fbb99e93ec9bca5e0056e996906adc..d044bd99681a9a0a844def083cb34d237d5333ca 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.h
+++ b/third_party/WebKit/Source/core/frame/UseCounter.h
@@ -1443,6 +1443,10 @@ class CORE_EXPORT UseCounter {
     V8MediaSession_PlaybackState_AttributeGetter = 1790,
     V8MediaSession_PlaybackState_AttributeSetter = 1791,
     V8MediaSession_SetActionHandler_Method = 1792,
+    WebNFCPush = 1793,
+    WebNFCCancelPush = 1794,
+    WebNFCWatch = 1795,
+    WebNFCCancelWatch = 1796,
 
     // Add new features immediately above this line. Don't change assigned
     // numbers of any item, and don't reuse removed slots.