Add missing (and remove superfluous) 'explicit' from constructors.

sync/internal_api/public/test/test_internal_components_factory.h

 // 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.
 
 #ifndef SYNC_INTERNAL_API_PUBLIC_TEST_TEST_INTERNAL_COMPONENTS_FACTORY_H_
 #define SYNC_INTERNAL_API_PUBLIC_TEST_TEST_INTERNAL_COMPONENTS_FACTORY_H_
 
 #include "sync/internal_api/public/internal_components_factory.h"
 
 namespace syncer {
 
 enum StorageOption {
   // BuildDirectoryBackingStore should not use persistent on-disk storage.
   STORAGE_IN_MEMORY,
   // Use this if you want BuildDirectoryBackingStore to create a real
   // on disk store.
   STORAGE_ON_DISK,
   // Use this to test the case where a directory fails to load.
   STORAGE_INVALID
 };
 
 class TestInternalComponentsFactory : public InternalComponentsFactory {
  public:
-  explicit TestInternalComponentsFactory(const Switches& switches,
-                                         StorageOption option);
+  TestInternalComponentsFactory(const Switches& switches,
+                                StorageOption option);
   virtual ~TestInternalComponentsFactory();
 
   virtual scoped_ptr<SyncScheduler> BuildScheduler(
       const std::string& name,
       sessions::SyncSessionContext* context) OVERRIDE;
 
   virtual scoped_ptr<sessions::SyncSessionContext> BuildContext(
       ServerConnectionManager* connection_manager,
       syncable::Directory* directory,
       const std::vector<ModelSafeWorker*> workers,
@@ skipping 13 matching lines @@
  private:
   const Switches switches_;
   const StorageOption storage_option_;
 
   DISALLOW_COPY_AND_ASSIGN(TestInternalComponentsFactory);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_TEST_TEST_INTERNAL_COMPONENTS_FACTORY_H_