[Sync] Remove some http-related chrome deps from SyncBackendHostImpl.

chrome/browser/sync/profile_sync_service_mock.cc

Index: chrome/browser/sync/profile_sync_service_mock.cc
diff --git a/chrome/browser/sync/profile_sync_service_mock.cc b/chrome/browser/sync/profile_sync_service_mock.cc
index 18bbc78d9ff9d307fb51a89499508cab48edd935..de015cf1c676d7c1a829e7ee8da823b636d7a77e 100644
--- a/chrome/browser/sync/profile_sync_service_mock.cc
+++ b/chrome/browser/sync/profile_sync_service_mock.cc
@@ -9,6 +9,7 @@
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/sync/chrome_sync_client.h"
+#include "chrome/browser/sync/profile_sync_test_util.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/testing_profile.h"
@@ -35,7 +36,8 @@ ProfileSyncServiceMock::ProfileSyncServiceMock(
           make_scoped_ptr(new SigninManagerWrapper(
               SigninManagerFactory::GetForProfile(profile))),
           ProfileOAuth2TokenServiceFactory::GetForProfile(profile),
-          browser_sync::MANUAL_START) {
+          browser_sync::MANUAL_START,
+          base::Bind(&EmptyNetworkTimeUpdate)) {
     ON_CALL(*this, IsSyncRequested()).WillByDefault(testing::Return(true));
 }