DevTools: make extension server a part of core, panels' code should depend on it.

Source/devtools/front_end/network/module.json

 {
     "extensions": [
         {
             "type": "@WebInspector.PanelFactory",
             "name": "network",
             "title": "Network",
             "order": 1,
             "className": "WebInspector.NetworkPanelFactory"
         },
         {
             "type": "@WebInspector.ContextMenu.Provider",
             "contextTypes": ["WebInspector.NetworkRequest", "WebInspector.Resource", "WebInspector.UISourceCode"],
             "className": "WebInspector.NetworkPanel.ContextMenuProvider"
         },
         {
             "type": "@WebInspector.Revealer",
             "contextTypes": ["WebInspector.NetworkRequest"],
             "className": "WebInspector.NetworkPanel.RequestRevealer"
         }
     ],
     "dependencies": ["source_frame"],
     "scripts": [
-        "HAREntry.js",
         "RequestView.js",
         "NetworkItemView.js",
         "RequestCookiesView.js",
         "RequestHeadersView.js",
         "RequestHTMLView.js",
         "RequestJSONView.js",
         "RequestPreviewView.js",
         "RequestResponseView.js",
         "RequestTimingView.js",
         "ResourceWebSocketFrameView.js",
         "NetworkPanel.js"
     ]
 }