[Sync] SyncEngine refactor part 1: interfaces.

components/sync/engine/fake_sync_engine.h

Index: components/sync/engine/fake_sync_engine.h
diff --git a/components/sync/driver/glue/sync_backend_host_mock.h b/components/sync/engine/fake_sync_engine.h
similarity index 89%
rename from components/sync/driver/glue/sync_backend_host_mock.h
rename to components/sync/engine/fake_sync_engine.h
index 66b5a26e25eba21b868ae6d4b8728254942e40b0..68e93474701fdfb7e8decf4430a740786b6a7a9f 100644
--- a/components/sync/driver/glue/sync_backend_host_mock.h
+++ b/components/sync/engine/fake_sync_engine.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_
-#define COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_
+#ifndef COMPONENTS_SYNC_ENGINE_FAKE_SYNC_ENGINE_H_
+#define COMPONENTS_SYNC_ENGINE_FAKE_SYNC_ENGINE_H_
 
 #include <memory>
 #include <string>
@@ -11,23 +11,23 @@
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "components/sync/base/weak_handle.h"
-#include "components/sync/driver/glue/sync_backend_host.h"
+#include "components/sync/engine/sync_engine.h"
 
 namespace syncer {
 
-// A mock of the SyncBackendHost.
+// A mock of the SyncEngine.
 //
 // This class implements the bare minimum required for the ProfileSyncService to
 // get through initialization.  It often returns null pointers or nonesense
-// values; it is not intended to be used in tests that depend on SyncBackendHost
+// values; it is not intended to be used in tests that depend on SyncEngine
 // behavior.
-class SyncBackendHostMock : public SyncBackendHost {
+class FakeSyncEngine : public SyncEngine {
  public:
-  SyncBackendHostMock();
-  ~SyncBackendHostMock() override;
+  FakeSyncEngine();
+  ~FakeSyncEngine() override;
 
   void Initialize(
-      SyncFrontend* frontend,
+      SyncEngineHost* host,
       scoped_refptr<base::SingleThreadTaskRunner> sync_task_runner,
       const WeakHandle<JsEventHandler>& event_handler,
       const GURL& service_url,
@@ -118,4 +118,4 @@ class SyncBackendHostMock : public SyncBackendHost {
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_
+#endif  // COMPONENTS_SYNC_ENGINE_FAKE_SYNC_ENGINE_H_