Add use counter for chrome.loadTimes

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 944166c0ae1f3d1dcd4fad5890f0144b50204ecf..b22423cdca9af078a5c4a5653222b31bafcac57b 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.h
+++ b/third_party/WebKit/Source/core/frame/UseCounter.h
@@ -1259,6 +1259,20 @@ public:
         SVGSMILAdditiveAnimation = 1484,
         SendBeaconWithNonSimpleContentType = 1485,
 
+        ChromeLoadtimesRequestTime = 1486,
+        ChromeLoadtimesStartLoadTime = 1487,
+        ChromeLoadtimesCommitLoadTime = 1488,
+        ChromeLoadtimesFinishDocumentLoadTime = 1489,
+        ChromeLoadtimesFinishLoadTime = 1490,
+        ChromeLoadtimesFirstPaintTime = 1491,
+        ChromeLoadtimesFirstPaintAfterLoadTime = 1492,
+        ChromeLoadtimesNavigationType = 1493,
+        ChromeLoadtimesWasFetchedViaSpdy = 1494,
+        ChromeLoadtimesWasNpnNegotiated = 1495,
+        ChromeLoadtimesNpnNegotiatedProtocol = 1496,
+        ChromeLoadtimesWasAlternateProtocolAvailable = 1497,
+        ChromeLoadtimesConnectionInfo = 1498,

[esprehn, 2016/08/05 20:57:36]

So crazy we're this high on UseCounters now, I remember when we had like 200 of
them. :)

[panicker, 2016/08/05 23:06:14]

Interesting.
Curious - is deprecation the primary usecase here? If so I'd expect the list to
grow, but also shrink sometimes :)

[esprehn, 2016/08/05 23:07:52]

The list might shrink, but the numbers can never go down or it'd mess of the
historical UMA data. This enum will grow to infinity :)

+
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.
         // Also, run update_use_counter_feature_enum.py in chromium/src/tools/metrics/histograms/