sync: add InternalComponentsFactory::Switches to simplify passing switches to internal components.

sync/engine/sync_scheduler_whitebox_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/message_loop.h"
 #include "base/time.h"
+#include "sync/engine/backoff_delay_provider.h"
 #include "sync/engine/sync_scheduler_impl.h"
 #include "sync/engine/throttled_data_type_tracker.h"
+#include "sync/internal_api/public/engine/polling_constants.h"
 #include "sync/sessions/sync_session_context.h"
 #include "sync/sessions/test_util.h"
 #include "sync/test/engine/fake_model_worker.h"
 #include "sync/test/engine/mock_connection_manager.h"
 #include "sync/test/engine/test_directory_setter_upper.h"
 #include "sync/test/fake_extensions_activity_monitor.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::TimeDelta;
@@ skipping 29 matching lines @@
     context_.reset(
         new SyncSessionContext(
             connection_.get(), dir_maker_.directory(),
             workers, &extensions_activity_monitor_,
             throttled_data_type_tracker_.get(),
             std::vector<SyncEngineEventListener*>(), NULL, NULL,
             true  /* enable keystore encryption */));
     context_->set_notifications_enabled(true);
     context_->set_account_name("Test");
     scheduler_.reset(
-        new SyncSchedulerImpl("TestSyncSchedulerWhitebox", context(), syncer));
+        new SyncSchedulerImpl("TestSyncSchedulerWhitebox",
+            BackoffDelayProvider::FromDefaults(),
+            context(),
+            syncer));
   }
 
   virtual void TearDown() {
     scheduler_.reset();
   }
 
   void SetMode(SyncScheduler::Mode mode) {
     scheduler_->mode_ = mode;
   }
 
@@ skipping 193 matching lines @@
   struct SyncSchedulerImpl::SyncSessionJob job;
   job.purpose = SyncSchedulerImpl::SyncSessionJob::CONFIGURATION;
   job.scheduled_start = TimeTicks::Now();
   job.is_canary_job = true;
   SyncSchedulerImpl::JobProcessDecision decision = DecideOnJob(job);
 
   EXPECT_EQ(decision, SyncSchedulerImpl::CONTINUE);
 }
 
 }  // namespace syncer