[DevTools] Move getCompletions to native

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 956 matching lines @@
                     { "name": "generatePreview", "type": "boolean", "optional": true, "hidden": true, "description": "Whether preview should be generated for the results." }
                 ],
                 "returns": [
                     { "name": "result", "type": "array", "items": { "$ref": "PropertyDescriptor" }, "description": "Object properties." },
                     { "name": "internalProperties", "optional": true, "type": "array", "items": { "$ref": "InternalPropertyDescriptor" }, "description": "Internal object properties (only of the element itself).", "hidden": true },
                     { "name": "exceptionDetails", "$ref": "ExceptionDetails", "optional": true, "hidden": true, "description": "Exception details."}
                 ],
                 "description": "Returns properties of a given object. Object group of the result is inherited from the target object."
             },
             {
+                "name": "getCompletions",
+                "parameters": [
+                    { "name": "objectId", "$ref": "RemoteObjectId", "optional": true, "description": "Identifier of the object to return completions for." },
+                    { "name": "primitiveType", "type": "string", "enum": [ "string", "number", "boolean" ], "optional": true, "description": "Type of primitive value to return completions for." }
+                ],
+                "returns": [
+                    { "name": "completions", "type": "array", "items": { "type": "string" } }
+                ],
+                "description": "Returns completions of a given object or for given primitive type.",
+                "hidden": true
+            },
+            {
                 "name": "releaseObject",
                 "parameters": [
                     { "name": "objectId", "$ref": "RemoteObjectId", "description": "Identifier of the object to release." }
                 ],
                 "description": "Releases remote object with given id."
             },
             {
                 "name": "releaseObjectGroup",
                 "parameters": [
                     { "name": "objectGroup", "type": "string", "description": "Symbolic object group name." }
@@ skipping 4123 matching lines @@
                 ],
                 "returns": [
                     { "name": "accessibilityNode", "$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
             }
         ]
     }]
 }