DevTools: NetworkPanel: show link where resource timing is explained.

Source/devtools/front_end/network/RequestTimingView.js

Index: Source/devtools/front_end/network/RequestTimingView.js
diff --git a/Source/devtools/front_end/network/RequestTimingView.js b/Source/devtools/front_end/network/RequestTimingView.js
index 4ecb501d8698088f3d930af0c544c1e0a44e5a76..939ba3fc52a4d206f6d0f9a11bee6a86bc5221ea 100644
--- a/Source/devtools/front_end/network/RequestTimingView.js
+++ b/Source/devtools/front_end/network/RequestTimingView.js
@@ -171,5 +171,9 @@ WebInspector.RequestTimingView.createTimingTable = function(request)
         cell.createTextChild(WebInspector.UIString("CAUTION: request is not finished yet!"));
     }
 
+    var note = tableElement.createChild("tr").createChild("td", "footnote");
+    note.colSpan = 2;
+    note.appendChild(WebInspector.createDocumentationAnchor("network#resource-network-timing", WebInspector.UIString("Explanation of resource timing")));
+
     return tableElement;
 }