sync: Refactor per-datatype throttling

sync/engine/sync_scheduler_unittest.cc

Index: sync/engine/sync_scheduler_unittest.cc
diff --git a/sync/engine/sync_scheduler_unittest.cc b/sync/engine/sync_scheduler_unittest.cc
index e8bbd65d89cf327f34d5af6b5243b842073c6a7d..f6be8a114f0994f38b58fb9559673a59dabb6f7d 100644
--- a/sync/engine/sync_scheduler_unittest.cc
+++ b/sync/engine/sync_scheduler_unittest.cc
@@ -8,6 +8,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
 #include "base/test/test_timeouts.h"
+#include "sync/engine/throttled_data_type_tracker.h"
 #include "sync/engine/sync_scheduler.h"
 #include "sync/engine/syncer.h"
 #include "sync/sessions/test_util.h"
@@ -98,6 +99,7 @@ class SyncSchedulerTest : public testing::Test {
     context_ = new SyncSessionContext(
         connection_.get(), directory(), registrar_.get(),
         &extensions_activity_monitor_,
+        &throttled_data_type_tracker_,
         std::vector<SyncEngineEventListener*>(), NULL, NULL);
     context_->set_notifications_enabled(true);
     context_->set_account_name("Test");
@@ -202,6 +204,7 @@ class SyncSchedulerTest : public testing::Test {
   MockDelayProvider* delay_;
   scoped_ptr<FakeModelSafeWorkerRegistrar> registrar_;
   FakeExtensionsActivityMonitor extensions_activity_monitor_;
+  ThrottledDataTypeTracker throttled_data_type_tracker_;
 };
 
 class BackoffTriggersSyncSchedulerTest : public SyncSchedulerTest {