Remove InstallTracker's extension load, unload observer

chrome/browser/extensions/activity_log/activity_log_unittest.cc

Index: chrome/browser/extensions/activity_log/activity_log_unittest.cc
diff --git a/chrome/browser/extensions/activity_log/activity_log_unittest.cc b/chrome/browser/extensions/activity_log/activity_log_unittest.cc
index 1a4fcd1b0b5e8552b9c6b9ba6ca1e4a714cde5fb..5c2468a5c6fafc8d410b07d4d665476a01ad9668 100644
--- a/chrome/browser/extensions/activity_log/activity_log_unittest.cc
+++ b/chrome/browser/extensions/activity_log/activity_log_unittest.cc
@@ -19,6 +19,7 @@
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "extensions/browser/extension_registry.h"
 #include "extensions/common/dom_action_types.h"
 #include "extensions/common/extension_builder.h"
 #include "sql/statement.h"
@@ -367,8 +368,7 @@ TEST_F(ActivityLogTest, UninstalledExtension) {
                       "document.write");
   action->set_page_url(GURL("http://www.google.com"));
 
-  activity_log->OnExtensionUninstalled(extension);
-
+  activity_log->OnExtensionUninstalled(NULL, extension);
   activity_log->GetFilteredActions(
       extension->id(),
       Action::ACTION_ANY,