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

chrome/browser/extensions/api/preferences_private/preferences_private_apitest.cc

Index: chrome/browser/extensions/api/preferences_private/preferences_private_apitest.cc
diff --git a/chrome/browser/extensions/api/preferences_private/preferences_private_apitest.cc b/chrome/browser/extensions/api/preferences_private/preferences_private_apitest.cc
index d02c271108f2f0fb91538b5a2e40cc0dbbc84686..02a5b08222c06ace55c1abe764715c8f62825845 100644
--- a/chrome/browser/extensions/api/preferences_private/preferences_private_apitest.cc
+++ b/chrome/browser/extensions/api/preferences_private/preferences_private_apitest.cc
@@ -24,6 +24,7 @@
 #include "chrome/browser/sync/chrome_sync_client.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
+#include "chrome/browser/sync/profile_sync_test_util.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
@@ -53,7 +54,8 @@ class FakeProfileSyncService : public ProfileSyncService {
             profile,
             make_scoped_ptr<SigninManagerWrapper>(NULL),
             ProfileOAuth2TokenServiceFactory::GetForProfile(profile),
-            browser_sync::MANUAL_START),
+            browser_sync::MANUAL_START,
+            base::Bind(&EmptyNetworkTimeUpdate)),
         sync_initialized_(true),
         initialized_state_violation_(false) {}