Make object property symbols pinnable and adjust symbol color in console.

Source/devtools/front_end/components/ObjectPropertiesSection.js

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 177 matching lines @@
         this.nameElement = document.createElement("span");
         this.nameElement.className = "name";
         var name = this.property.name;
         if (/^\s|\s$|^$|\n/.test(name))
             name = "\"" + name.replace(/\n/g, "\u21B5") + "\"";
         this.nameElement.textContent = name;
         if (!this.property.enumerable)
             this.nameElement.classList.add("dimmed");
         if (this.property.isAccessorProperty())
             this.nameElement.classList.add("properties-accessor-property-name");
+        if (this.property.symbol)
+            this.nameElement.addEventListener("contextmenu", this._contextMenuFired.bind(this, this.property.symbol), false);
 
         var separatorElement = document.createElement("span");
         separatorElement.className = "separator";
         separatorElement.textContent = ": ";
 
         if (this.property.value) {
             this.valueElement = document.createElement("span");
             this.valueElement.className = "value";
             var description = this.property.value.description;
             var valueText;
@@ skipping 779 matching lines @@
 {
     WebInspector.TextPrompt.call(this, WebInspector.ExecutionContextSelector.completionsForTextPromptInCurrentContext);
     this.setSuggestBoxEnabled(true);
     if (renderAsBlock)
         this.renderAsBlock();
 }
 
 WebInspector.ObjectPropertyPrompt.prototype = {
     __proto__: WebInspector.TextPrompt.prototype
 }