[MD Extensions] Include the manifest code snippet in load errors

chrome/browser/resources/md_extensions/load_error.js

Index: chrome/browser/resources/md_extensions/load_error.js
diff --git a/chrome/browser/resources/md_extensions/load_error.js b/chrome/browser/resources/md_extensions/load_error.js
index 75b47ffa558815f0ae0f5e530b142becd8714191..942407dc3e40d2ec0e37027f3a9f420a03c03c45 100644
--- a/chrome/browser/resources/md_extensions/load_error.js
+++ b/chrome/browser/resources/md_extensions/load_error.js
@@ -19,11 +19,14 @@ cr.define('extensions', function() {
       /** @type {extensions.LoadErrorDelegate} */
       delegate: Object,
 
-      error: String,
-
-      filePath: String,
+      /** @type {chrome.developerPrivate.LoadError} */
+      loadError: Object,
     },
 
+    observers: [
+      'observeLoadErrorChanges_(loadError)',
+    ],
+
     show: function() {
       this.$$('dialog').showModal();
     },
@@ -37,6 +40,25 @@ cr.define('extensions', function() {
       this.delegate.retryLoadUnpacked();
       this.close();
     },
+
+    /** @private */
+    observeLoadErrorChanges_: function() {
+      assert(this.loadError);
+      var source = this.loadError.source;
+      // CodeSection expects a RequestFileSourceResponse, rather than an
+      // ErrorFileSource. Massage into place.
+      // TODO(devlin): Make RequestFileSourceResponse use ErrorFileSource.
+      /** @type {!chrome.developerPrivate.RequestFileSourceResponse} */
+      var codeSectionProperties = {
+        beforeHighlight: source ? source.beforeHighlight : '',
+        highlight: source ? source.highlight : '',
+        afterHighlight: source ? source.afterHighlight : '',
+        title: '',
+        message: this.loadError.error,
+      };
+
+      this.$.code.code = codeSectionProperties;
+    },
   });
 
   return {LoadError: LoadError,