[Sync] Fixing sync_driver lint violations and adding PRESUBMIT lint check.

components/sync_driver/model_association_manager_unittest.cc

 // Copyright 2014 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/callback.h"
 #include "base/message_loop/message_loop.h"
 #include "components/sync_driver/fake_data_type_controller.h"
 #include "components/sync_driver/model_association_manager.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 17 matching lines @@
 };
 
 FakeDataTypeController* GetController(
     const DataTypeController::TypeMap& controllers,
     syncer::ModelType model_type) {
   DataTypeController::TypeMap::const_iterator it =
       controllers.find(model_type);
   if (it == controllers.end()) {
     return NULL;
   }
-  return (FakeDataTypeController*)(it->second.get());
+  return static_cast<FakeDataTypeController*>(it->second.get());
 }
 
 ACTION_P(VerifyResult, expected_result) {
   EXPECT_EQ(arg0.status, expected_result.status);
   EXPECT_TRUE(arg0.requested_types.Equals(expected_result.requested_types));
 }
 
 class SyncModelAssociationManagerTest : public testing::Test {
  public:
   SyncModelAssociationManagerTest() {
@@ skipping 328 matching lines @@
 
   EXPECT_CALL(delegate_,
               OnSingleDataTypeWillStop(syncer::BOOKMARKS, _));
   model_association_manager.GetTimerForTesting()->user_task().Run();
 
   EXPECT_EQ(DataTypeController::NOT_RUNNING,
             GetController(controllers_, syncer::BOOKMARKS)->state());
 }
 
 }  // namespace sync_driver