Devtools: parse variables scopes and sourcemap them

third_party/WebKit/Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications.",
@@ skipping 3513 matching lines @@
                 ],
                 "description": "JavaScript call stack, including async stack traces.",
                 "hidden": true
             },
             {
                 "id": "Scope",
                 "type": "object",
                 "properties": [
                     { "name": "type", "type": "string", "enum": ["global", "local", "with", "closure", "catch", "block", "script"], "description": "Scope type." },
                     { "name": "object", "$ref": "Runtime.RemoteObject", "description": "Object representing the scope. For <code>global</code> and <code>with</code> scopes it represents the actual object; for the rest of the scopes, it is artificial transient object enumerating scope variables as its properties." },
-                    { "name": "name", "type": "string", "optional": true, "hidden": true }
+                    { "name": "name", "type": "string", "optional": true, "hidden": true },
+                    { "name": "startLocation", "$ref": "Location", "optional": true, "hidden": true, "description": "Location in the source code where scope starts" },
+                    { "name": "endLocation", "$ref": "Location", "optional": true, "hidden": true, "description": "Location in the source code where scope ends" }
                 ],
                 "description": "Scope description."
             },
             {
                 "id": "SetScriptSourceError",
                 "type": "object",
                 "properties": [
                     { "name": "message", "type": "string", "description": "Compiler error message" },
                     { "name": "lineNumber", "type": "integer", "description": "Compile error line number (1-based)" },
                     { "name": "columnNumber", "type": "integer", "description": "Compile error column number (1-based)" }
@@ skipping 1746 matching lines @@
                 ],
                 "returns": [
                     { "name": "accessibilityNode", "$ref": "AXNode", "description": "The <code>Accessibility.AXNode</code> for this DOM node, if it exists.", "optional": true }
                 ],
                 "description": "Fetches the accessibility node for this DOM node, if it exists.",
                 "hidden": true
             }
         ]
     }]
 }