Bug 1272501 - Add Telemetry to the Blink/Webkit FileSystem API - part 2, r=smaug

dom/html/HTMLInputElement.cpp

@@ -1780,6 +1780,10 @@ HTMLInputElement::BeforeSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
         container->RadioRequiredWillChange(name, !!aValue);
       }
     }
+
+    if (aName == nsGkAtoms::webkitdirectory) {
+      Telemetry::Accumulate(Telemetry::WEBKIT_DIRECTORY_USED, true);
+    }
   }
 
   return nsGenericHTMLFormElementWithState::BeforeSetAttr(aNameSpaceID, aName,

toolkit/components/telemetry/Histograms.json

@@ -10906,5 +10906,13 @@
     "bug_numbers": [1272501],
     "releaseChannelCollection": "opt-out",
     "description": "Webkit/Blink filesystem used"
+  },
+  "WEBKIT_DIRECTORY_USED": {
+    "alert_emails": ["amarchesini@mozilla.com"],
+    "expires_in_version": "never",
+    "kind": "boolean",
+    "bug_numbers": [1272501],
+    "releaseChannelCollection": "opt-out",
+    "description": "HTMLInputElement.webkitdirectory attribute used"
   }
 }