Connect BackgroundFetch to the OfflineItemCollection

chrome/test/base/testing_profile.cc

Index: chrome/test/base/testing_profile.cc
diff --git a/chrome/test/base/testing_profile.cc b/chrome/test/base/testing_profile.cc
index edeed7859bf421be26f6801bc2933046e7ffaf19..9e66a48368914564515e0b5222740db655c06063 100644
--- a/chrome/test/base/testing_profile.cc
+++ b/chrome/test/base/testing_profile.cc
@@ -972,6 +972,10 @@ content::PermissionManager* TestingProfile::GetPermissionManager() {
   return NULL;
 }
 
+content::BackgroundFetchClient* TestingProfileImpl::GetBackgroundFetchClient() {
+  return nullptr;
+}
+
 content::BackgroundSyncController*
 TestingProfile::GetBackgroundSyncController() {
   return nullptr;