Devtools: allow multiple custom formatters

Source/core/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 1288 matching lines @@
 InjectedScript.RemoteObject.prototype = {
 
     /**
      * @param {*} object
      * @param {string=} objectGroupName
      * @return {?RuntimeAgent.CustomPreview}
      */
     _customPreview: function(object, objectGroupName)
     {
         try {
-            var formatter = inspectedWindow["devtoolsFormatter"];
-            if (!formatter)
+            var formatters = inspectedWindow["devtoolsFormatters"];
+            if (!formatters || !isArrayLike(formatters))
                 return null;
 
-            var formatted = formatter.header(object);
-            if (!formatted)
-                return null;
+            for (var i = 0; i < formatters.length; ++i) {
+                try {
+                    var formatted = formatters[i].header(object);
+                    if (!formatted)
+                        continue;
 
-            var hasBody = formatter.hasBody(object);
-            injectedScript._substituteObjectTagsInCustomPreview(objectGroupName, formatted);
-            return {header: JSON.stringify(formatted), hasBody: !!hasBody};
+                    var hasBody = formatters[i].hasBody(object);
+                    injectedScript._substituteObjectTagsInCustomPreview(objectGroupName, formatted);
+                    var formatterObjectId = injectedScript._bind(formatters[i], objectGroupName);
+                    return {header: JSON.stringify(formatted), hasBody: !!hasBody, formatterObjectId: formatterObjectId};
+                } catch (e) {
+                    inspectedWindow.console.error("Custom Formatter Failed: " + e);
+                }
+            }
         } catch (e) {
             inspectedWindow.console.error("Custom Formatter Failed: " + e);
-            return null;
         }
+        return null;
     },
 
     /**
      * @return {!RuntimeAgent.ObjectPreview} preview
      */
     _createEmptyPreview: function()
     {
         var preview = {
             type: /** @type {!RuntimeAgent.ObjectPreviewType.<string>} */ (this.type),
             description: this.description || toStringDescription(this.value),
@@ skipping 656 matching lines @@
      */
     _logEvent: function(event)
     {
         inspectedWindow.console.log(event.type, event);
     }
 }
 
 injectedScript._commandLineAPIImpl = new CommandLineAPIImpl();
 return injectedScript;
 })