[Sync] Add support for performing a GetKey on startup.

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/sync_scheduler.h"
 #include "sync/engine/throttled_data_type_tracker.h"
 #include "sync/sessions/sync_session_context.h"
 #include "sync/sessions/test_util.h"
@@ skipping 33 matching lines @@
       workers.push_back(it->get());
     }
 
     connection_.reset(new MockConnectionManager(NULL));
     throttled_data_type_tracker_.reset(new ThrottledDataTypeTracker(NULL));
     context_.reset(
         new SyncSessionContext(
             connection_.get(), dir_maker_.directory(),
             routes, workers, &extensions_activity_monitor_,
             throttled_data_type_tracker_.get(),
-            std::vector<SyncEngineEventListener*>(), NULL, NULL));
+            std::vector<SyncEngineEventListener*>(), NULL, NULL,
+            true  /* enable keystore encryption */));
     context_->set_notifications_enabled(true);
     context_->set_account_name("Test");
     scheduler_.reset(
         new SyncScheduler("TestSyncSchedulerWhitebox", context(), syncer));
   }
 
   virtual void TearDown() {
     scheduler_.reset();
   }
 
@@ skipping 196 matching lines @@
   struct SyncScheduler::SyncSessionJob job;
   job.purpose = SyncScheduler::SyncSessionJob::CONFIGURATION;
   job.scheduled_start = TimeTicks::Now();
   job.is_canary_job = true;
   SyncScheduler::JobProcessDecision decision = DecideOnJob(job);
 
   EXPECT_EQ(decision, SyncScheduler::CONTINUE);
 }
 
 }  // namespace syncer