Add experimental.alarms API to allow lazy background pages to

chrome/browser/extensions/extension_module.cc

Index: chrome/browser/extensions/extension_module.cc
diff --git a/chrome/browser/extensions/extension_module.cc b/chrome/browser/extensions/extension_module.cc
index a1c884bdc08c736b7eeddc06a1f55b34d031acf8..eb5f1e758c212c32b9d71bf3b7888bb8997bcf7e 100644
--- a/chrome/browser/extensions/extension_module.cc
+++ b/chrome/browser/extensions/extension_module.cc
@@ -6,10 +6,32 @@
 
 #include <string>
 
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/extensions/extension_event_router.h"
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 
+namespace {
+
+const char kOnInstalledEvent[] = "experimental.extension.onInstalled";
+
+}
+
+// static
+void ExtensionModuleEventRouter::DispatchOnInstalledEvent(
+    Profile* profile, const Extension* extension) {
+  // Special case: normally, extensions add their own lazy event listeners.
+  // However, since the extension has just been installed, it hasn't had a
+  // chance to register for events. So we register on its behalf. If the
+  // extension does not actually have a listener, the event will just be
+  // ignored.
+  ExtensionEventRouter* router = profile->GetExtensionEventRouter();
+  router->AddLazyEventListener(kOnInstalledEvent, extension->id());
+  router->DispatchEventToExtension(
+      extension->id(), kOnInstalledEvent, "[]", NULL, GURL());
+}
+
 ExtensionPrefs* SetUpdateUrlDataFunction::extension_prefs() {
   return profile()->GetExtensionService()->extension_prefs();
 }