Replace wstring with string16 in sandbox

sandbox/win/src/sync_dispatcher.h

Index: sandbox/win/src/sync_dispatcher.h
diff --git a/sandbox/win/src/sync_dispatcher.h b/sandbox/win/src/sync_dispatcher.h
index 1d1b978c9ad552e6cafcc9d471534a374b188194..db44ba4dcd0cb36ea90d45b7f5ba4367bd05553b 100644
--- a/sandbox/win/src/sync_dispatcher.h
+++ b/sandbox/win/src/sync_dispatcher.h
@@ -6,6 +6,7 @@
 #define SANDBOX_SRC_SYNC_DISPATCHER_H_
 
 #include "base/basictypes.h"
+#include "base/strings/string16.h"
 #include "sandbox/win/src/crosscall_server.h"
 #include "sandbox/win/src/sandbox_policy_base.h"
 
@@ -22,11 +23,11 @@ class SyncDispatcher : public Dispatcher {
 
 private:
   // Processes IPC requests coming from calls to CreateEvent in the target.
-  bool CreateEvent(IPCInfo* ipc, std::wstring* name, DWORD event_type,
+  bool CreateEvent(IPCInfo* ipc, base::string16* name, DWORD event_type,
                    DWORD initial_state);
 
   // Processes IPC requests coming from calls to OpenEvent in the target.
-  bool OpenEvent(IPCInfo* ipc, std::wstring* name, DWORD desired_access);
+  bool OpenEvent(IPCInfo* ipc, base::string16* name, DWORD desired_access);
 
   PolicyBase* policy_base_;
   DISALLOW_COPY_AND_ASSIGN(SyncDispatcher);