[DevTools] Introduce unserializableValue in RemoteObject.

third_party/WebKit/Source/platform/v8_inspector/InjectedScriptSource.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 698 matching lines @@
         if (this.type !== "undefined")
             this.value = object;
 
         // Null object is object with 'null' subtype.
         if (object === null)
             this.subtype = "null";
 
         // Provide user-friendly number values.
         if (this.type === "number") {
             this.description = toStringDescription(object);
-            // Override "value" property for values that can not be JSON-stringified.
             switch (this.description) {
             case "NaN":
             case "Infinity":
             case "-Infinity":
             case "-0":
-                this.value = this.description;
+                delete this.value;
+                this.unserializableValue = this.description;
                 break;
             }
         }
 
         return;
     }
 
     if (injectedScript._shouldPassByValue(object)) {
         this.value = object;
         this.subtype = injectedScript._subtype(object);
@@ skipping 314 matching lines @@
             return string.substr(0, leftHalf) + "\u2026" + string.substr(string.length - rightHalf, rightHalf);
         }
         return string.substr(0, maxLength) + "\u2026";
     },
 
     __proto__: null
 }
 
 return injectedScript;
 })