Show media and VTT text tracks in the devtools.

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications."
@@ skipping 51 matching lines @@
             }
         ]
     },
     {
         "domain": "Page",
         "description": "Actions and events related to the inspected page belong to the page domain.",
         "types": [
             {
                 "id": "ResourceType",
                 "type": "string",
-                "enum": ["Document", "Stylesheet", "Image", "Font", "Script", "XHR", "WebSocket", "Other"],
+                "enum": ["Document", "Stylesheet", "Image", "Media", "Font", "Script", "TextTrack", "XHR", "WebSocket", "Other"],
                 "description": "Resource type as it was perceived by the rendering engine."
             },
             {
               "id": "FrameId",
               "type": "string",
               "description": "Unique frame identifier."
             },
             {
                 "id": "Frame",
                 "type": "object",
@@ skipping 3978 matching lines @@
             {
                 "name": "dataAvailable",
                 "parameters": [
                     {"name": "value", "type": "array", "items": { "$ref": "PowerEvent" }, "description": "List of power events." }
                 ],
                 "handlers": ["browser", "frontend"]
             }
         ]
     }]
 }