DevTools: Add timestamp support in the console

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications."
@@ skipping 903 matching lines @@
         ],
         "events": [
             {
                 "name": "messageAdded",
                 "parameters": [
                     { "name": "message", "$ref": "ConsoleMessage", "description": "Console message that has been added." }
                 ],
                 "description": "Issued when new console message is added."
             },
             {
-                "name": "messageRepeatCountUpdated",
-                "parameters": [
-                    { "name": "count", "type": "integer", "description": "New repeat count value." },
-                    { "name": "timestamp", "$ref": "Timestamp", "description": "Timestamp of most recent message in batch.", "hidden": true }
-                ],
-                "description": "Issued when subsequent message(s) are equal to the previous one(s)."
-            },
-            {
                 "name": "messagesCleared",
                 "description": "Issued when console is cleared. This happens either upon <code>clearMessages</code> command or after page navigation."
             }
         ]
     },
     {
         "domain": "Network",
         "description": "Network domain allows tracking network activities of the page. It exposes information about http, file, data and other requests and responses, their headers, bodies, timing, etc.",
         "types": [
             {
@@ skipping 3122 matching lines @@
             {
                 "name": "dataAvailable",
                 "parameters": [
                     {"name": "value", "type": "array", "items": { "$ref": "PowerEvent" }, "description": "List of power events." }
                 ],
                 "handlers": ["browser", "frontend"]
             }
         ]
     }]
 }