Handle termination/crashes of an extension hosted in the ExtensionDialog.

chrome/browser/ui/views/extensions/extension_dialog.cc

Index: chrome/browser/ui/views/extensions/extension_dialog.cc
diff --git a/chrome/browser/ui/views/extensions/extension_dialog.cc b/chrome/browser/ui/views/extensions/extension_dialog.cc
index 08f4e7548f008691380c3863bbf476c858f1ab29..a38886fed9169d4328e8eedf671f64cd90acf628 100644
--- a/chrome/browser/ui/views/extensions/extension_dialog.cc
+++ b/chrome/browser/ui/views/extensions/extension_dialog.cc
@@ -36,6 +36,9 @@ ExtensionDialog::ExtensionDialog(ExtensionHost* host,
   // Listen for the containing view calling window.close();
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_HOST_VIEW_SHOULD_CLOSE,
                  content::Source<Profile>(host->profile()));
+  // Listen for a crash or other termination of the extension process.
+  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_PROCESS_TERMINATED,
+                 content::Source<Profile>(host->profile()));
 }
 
 ExtensionDialog::~ExtensionDialog() {
@@ -173,6 +176,12 @@ void ExtensionDialog::Observe(int type,
         return;
       Close();
       break;
+    case chrome::NOTIFICATION_EXTENSION_PROCESS_TERMINATED:
+      if (content::Details<ExtensionHost>(host()) != details)
+        return;
+      if (observer_)
+        observer_->ExtensionTerminated(this);
+      break;
     default:
       NOTREACHED() << L"Received unexpected notification";
       break;