Replace wstring with string16 in sandbox

sandbox/win/src/sync_dispatcher.cc

Index: sandbox/win/src/sync_dispatcher.cc
diff --git a/sandbox/win/src/sync_dispatcher.cc b/sandbox/win/src/sync_dispatcher.cc
index 3769fc6c67db422248133c7e5a1855cf89cb2fab..d4b36d5fc85000fc591f566229b25ad552d4222e 100644
--- a/sandbox/win/src/sync_dispatcher.cc
+++ b/sandbox/win/src/sync_dispatcher.cc
@@ -43,7 +43,7 @@ bool SyncDispatcher::SetupService(InterceptionManager* manager,
   return false;
 }
 
-bool SyncDispatcher::CreateEvent(IPCInfo* ipc, std::wstring* name,
+bool SyncDispatcher::CreateEvent(IPCInfo* ipc, base::string16* name,
                                  DWORD event_type, DWORD initial_state) {
   const wchar_t* event_name = name->c_str();
   CountedParameterSet<NameBased> params;
@@ -61,7 +61,7 @@ bool SyncDispatcher::CreateEvent(IPCInfo* ipc, std::wstring* name,
   return true;
 }
 
-bool SyncDispatcher::OpenEvent(IPCInfo* ipc, std::wstring* name,
+bool SyncDispatcher::OpenEvent(IPCInfo* ipc, base::string16* name,
                                DWORD desired_access) {
   const wchar_t* event_name = name->c_str();