[Offline Pages] Add an observer for requests in the CCT namespace.

chrome/browser/android/offline_pages/request_coordinator_factory.cc

Index: chrome/browser/android/offline_pages/request_coordinator_factory.cc
diff --git a/chrome/browser/android/offline_pages/request_coordinator_factory.cc b/chrome/browser/android/offline_pages/request_coordinator_factory.cc
index 2fd870b6056165bca834e34fae86e362157859bf..53bd4ca5a7be67d6d3c0c2eb5e88e431358f44dd 100644
--- a/chrome/browser/android/offline_pages/request_coordinator_factory.cc
+++ b/chrome/browser/android/offline_pages/request_coordinator_factory.cc
@@ -11,6 +11,7 @@
 #include "base/sequenced_task_runner.h"
 #include "base/task_scheduler/post_task.h"
 #include "chrome/browser/android/offline_pages/background_scheduler_bridge.h"
+#include "chrome/browser/android/offline_pages/cct_request_observer.h"
 #include "chrome/browser/android/offline_pages/downloads/offline_page_notification_bridge.h"
 #include "chrome/browser/android/offline_pages/offline_page_model_factory.h"
 #include "chrome/browser/android/offline_pages/prerendering_offliner.h"
@@ -89,6 +90,8 @@ KeyedService* RequestCoordinatorFactory::BuildServiceInstanceFor(
       request_coordinator,
       base::MakeUnique<android::OfflinePageNotificationBridge>());
 
+  CCTRequestObserver::AttachToRequestCoordinator(request_coordinator);
+
   return request_coordinator;
 }