Retry reinstallation of corrupted policy extensions.

chrome/browser/extensions/extension_service.h

Index: chrome/browser/extensions/extension_service.h
diff --git a/chrome/browser/extensions/extension_service.h b/chrome/browser/extensions/extension_service.h
index 059a5cf4a7187fb6e56bcc16a2d40bd01d9baed3..815f383cd1eb2ba2e89b726b7001c34882bb7f65 100644
--- a/chrome/browser/extensions/extension_service.h
+++ b/chrome/browser/extensions/extension_service.h
@@ -449,6 +449,10 @@ class ExtensionService
     external_updates_finished_callback_ = callback;
   }
 
+  void set_external_updates_disabled_for_test(bool value) {
+    external_updates_disabled_for_test_ = value;
+  }
+
  private:
   // Loads extensions specified via a command line flag/switch.
   void LoadExtensionsFromCommandLineFlag(const char* switch_name);
@@ -677,6 +681,9 @@ class ExtensionService
   // decide to abort.
   bool browser_terminating_ = false;
 
+  // If set, call to CheckForExternalUpdates() will bail out.
+  bool external_updates_disabled_for_test_ = false;
+
   // Set to true if this is the first time this ExtensionService has run.
   // Used for specially handling external extensions that are installed the
   // first time.