Consistently use notifications from component updater w/ on-demand PNaCl.

chrome/browser/component_updater/component_updater_service.h

Index: chrome/browser/component_updater/component_updater_service.h
diff --git a/chrome/browser/component_updater/component_updater_service.h b/chrome/browser/component_updater/component_updater_service.h
index bf011eb43e022d3940a0b874390ab09923eab858..34f70bb96fff58c149f09096dca885669e78651f 100644
--- a/chrome/browser/component_updater/component_updater_service.h
+++ b/chrome/browser/component_updater/component_updater_service.h
@@ -20,6 +20,10 @@ class DictionaryValue;
 class FilePath;
 }
 
+namespace content {
+class NotificationSource;
+}
+
 class ComponentPatcher;
 
 // Component specific installers must derive from this class and implement
@@ -168,6 +172,14 @@ class ComponentUpdateService {
   // via the Install() hook.
   virtual Status CheckForUpdateSoon(const CrxComponent& component) = 0;
 
+  typedef std::string UpdateSource;

[cpu_(ooo_6.6-7.5), 2013/07/01 18:30:22]

not big fan of this typedef

[jvoung (off chromium), 2013/07/02 01:04:26]

Ok, removed and changed back to string.

+
+  // Return true if a NOTIFICATION_COMPONENT_UPDATE_FOUND or
+  // NOTIFICATION_COMPONENT_UPDATE_READY is for the given component.
+  static bool IsUpdateNotificationForComponent(
+      const content::NotificationSource& src,
+      const CrxComponent& component);
+
   virtual ~ComponentUpdateService() {}
 };