Correctly handle object classname and add Symbol type to PropertyPreview and CallArgument in the pr…

Source/devtools/protocol.json

Index: Source/devtools/protocol.json
diff --git a/Source/devtools/protocol.json b/Source/devtools/protocol.json
index dd2b79e1cc6a26a6f679debdc6aeed362e8115d2..6c2a6c33e7f91b226fa3b2d114b830e15a8713c7 100644
--- a/Source/devtools/protocol.json
+++ b/Source/devtools/protocol.json
@@ -687,10 +687,10 @@
                 "hidden": true,
                 "properties": [
                     { "name": "name", "type": "string", "description": "Property name." },
-	                { "name": "type", "type": "string", "enum": ["object", "function", "undefined", "string", "number", "boolean", "accessor"], "description": "Object type. Accessor means that the property itself is an accessor property." },
-	                { "name": "value", "type": "string", "optional": true, "description": "User-friendly property value string." },
-	                { "name": "valuePreview", "$ref": "ObjectPreview", "optional": true, "description": "Nested value preview." },
-	                { "name": "subtype", "type": "string", "optional": true, "enum": ["array", "null", "node", "regexp", "date"], "description": "Object subtype hint. Specified for <code>object</code> type values only." }
+                    { "name": "type", "type": "string", "enum": ["object", "function", "undefined", "string", "number", "boolean", "symbol", "accessor"], "description": "Object type. Accessor means that the property itself is an accessor property." },
+                    { "name": "value", "type": "string", "optional": true, "description": "User-friendly property value string." },
+                    { "name": "valuePreview", "$ref": "ObjectPreview", "optional": true, "description": "Nested value preview." },
+                    { "name": "subtype", "type": "string", "optional": true, "enum": ["array", "null", "node", "regexp", "date"], "description": "Object subtype hint. Specified for <code>object</code> type values only." }
                 ]
             },
             {
@@ -727,7 +727,7 @@
                 "properties": [
                     { "name": "value", "type": "any", "optional": true, "description": "Primitive value, or description string if the value can not be JSON-stringified (like NaN, Infinity, -Infinity, -0)." },
                     { "name": "objectId", "$ref": "RemoteObjectId", "optional": true, "description": "Remote object handle." },
-                    { "name": "type", "optional": true, "hidden": true, "type": "string", "enum": ["object", "function", "undefined", "string", "number", "boolean"], "description": "Object type." }
+                    { "name": "type", "optional": true, "hidden": true, "type": "string", "enum": ["object", "function", "undefined", "string", "number", "boolean", "symbol"], "description": "Object type." }
                 ]
             },
             {