[Extensions] Make chrome://extensions use developerPrivate for unpacked loading

chrome/browser/resources/extensions/extension_loader.js

Index: chrome/browser/resources/extensions/extension_loader.js
diff --git a/chrome/browser/resources/extensions/extension_loader.js b/chrome/browser/resources/extensions/extension_loader.js
index e089c6f29f9c9ad5f58c58e7527825653bc2b482..fe3614808d9f57c19d42fdc896f23c3c3fa7af1e 100644
--- a/chrome/browser/resources/extensions/extension_loader.js
+++ b/chrome/browser/resources/extensions/extension_loader.js
@@ -180,6 +180,13 @@ cr.define('extensions', function() {
      */
     this.loadError_ = new ExtensionLoadError(
         /** @type {HTMLDivElement} */($('extension-load-error')));
+
+    /**
+     * Whether or not we are currently loading an unpacked extension.
+     * @type {boolean}
+     * @private

[Dan Beam, 2015/03/03 23:37:03]

nit: @private {boolean}

[Devlin, 2015/03/04 17:29:13]

Done.

+     */
+    this.isLoading_ = false;
   }
 
   cr.addSingletonGetter(ExtensionLoader);
@@ -190,7 +197,15 @@ cr.define('extensions', function() {
      * encountered, this object will get notified via notifyFailed().
      */
     loadUnpacked: function() {
-      chrome.send('extensionLoaderLoadUnpacked');
+      if (this.isLoading_)  // Only one running load at a time.
+        return;
+      this.isLoading_ = true;
+      chrome.developerPrivate.loadUnpacked({failQuietly: true}, function() {
+        // Check lastError to avoid the log, but don't do anything with it -
+        // error-handling is done on the C++ side.
+        var lastError = chrome.runtime.lastError;

[Dan Beam, 2015/03/03 23:37:03]

:(

[Devlin, 2015/03/04 17:29:13]

Yeah :/

+        this.isLoading_ = false;
+      }.bind(this));
     },
 
     /**