DevTools: Remove Network.requestServedFromMemoryCache event from protocol.

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "0" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications."
@@ skipping 1129 matching lines @@
                 "name": "loadingFailed",
                 "description": "Fired when HTTP request has failed to load.",
                 "parameters": [
                     { "name": "requestId", "$ref": "RequestId", "description": "Request identifier." },
                     { "name": "timestamp", "$ref": "Timestamp", "description": "Timestamp." },
                     { "name": "errorText", "type": "string", "description": "User friendly error message." },
                     { "name": "canceled", "type": "boolean", "optional": true, "description": "True if loading was canceled." }
                 ]
             },
             {
-                "name": "requestServedFromMemoryCache",
-                "description": "Fired when HTTP request has been served from memory cache.",
-                "parameters": [
-                    { "name": "requestId", "$ref": "RequestId", "description": "Request identifier." },
-                    { "name": "frameId", "$ref": "Page.FrameId", "description": "Frame identifier.", "hidden": true },
-                    { "name": "loaderId", "$ref": "LoaderId", "description": "Loader identifier." },
-                    { "name": "documentURL", "type": "string", "description": "URL of the document this request is loaded for." },
-                    { "name": "timestamp", "$ref": "Timestamp", "description": "Timestamp." },
-                    { "name": "initiator", "$ref": "Initiator", "description": "Request initiator." },
-                    { "name": "resource", "$ref": "CachedResource", "description": "Cached resource data." }
-                ]
-            },
-            {
                 "name": "webSocketWillSendHandshakeRequest",
                 "description": "Fired when WebSocket is about to initiate handshake.",
                 "parameters": [
                     { "name": "requestId", "$ref": "RequestId", "description": "Request identifier." },
                     { "name": "timestamp", "$ref": "Timestamp", "description": "Timestamp." },
                     { "name": "request", "$ref": "WebSocketRequest", "description": "WebSocket request data." }
                 ],
                 "hidden": true
             },
             {
@@ skipping 2771 matching lines @@
                 "parameters": [
                     { "name": "value", "type": "array", "items": { "type": "object" } }
                 ]
             },
             {
                 "name": "tracingComplete"
             }
         ]
     }]
 }