DevTools: add "Jump to Relayout Boundary" context menu item in Elements panel

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "0" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications."
@@ skipping 2107 matching lines @@
                 "hidden": true
             },
             {
                 "name": "setFileInputFiles",
                 "parameters": [
                     { "name": "nodeId", "$ref": "NodeId", "description": "Id of the file input node to set files for." },
                     { "name": "files", "type": "array", "items": { "type": "string" }, "description": "Array of file paths to set." }
                 ],
                 "description": "Sets files for the given file input element.",
                 "hidden": true
+            },
+            {
+                "name": "relayoutBoundaryForNode",

[pfeldman, 2013/09/06 13:35:51]

getRelayoutBoundary

+                "parameters": [
+                    { "name": "nodeId", "$ref": "NodeId", "description": "Id of the node." }
+                ],
+                "returns": [
+                    { "name": "relayoutBoundaryNodeId", "$ref": "NodeId", "description": "Relayout boundary node id for the given node." }
+                ],
+                "description": "Returns the id of the nearest ancestor that is a relayout boundary.",
+                "hidden": true
             }
         ],
         "events": [
             {
                 "name": "documentUpdated",
                 "description": "Fired when <code>Document</code> has been totally updated. Node ids are no longer valid."
             },
             {
                 "name": "inspectNodeRequested",
                 "parameters": [
@@ skipping 1741 matching lines @@
                 "parameters": [
                     { "name": "value", "type": "array", "items": { "type": "object" } }
                 ]
             },
             {
                 "name": "tracingComplete"
             }
         ]
     }]
 }