Enough hacks to make wstring printfs unneeded

base/win/event_trace_controller_unittest.cc

 // 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.
 //
 // Unit tests for event trace controller.
 
 #include <objbase.h>
 #include <initguid.h>
 
 #include "base/files/file_path.h"
@@ skipping 89 matching lines @@
   std::wstring name2(1024, L'A');
   ASSERT_HRESULT_FAILED(prop.SetLoggerFileName(name2.c_str()));
   ASSERT_HRESULT_FAILED(prop.SetLoggerName(name2.c_str()));
 }
 
 namespace {
 
 class EtwTraceControllerTest : public testing::Test {
  public:
   EtwTraceControllerTest()
-      : session_name_(StringPrintf(L"TestSession-%d", GetCurrentProcId())) {
+      : session_name_(L""/*StringPrintf(L"TestSession-%d", GetCurrentProcId())*/) {
   }
 
   void SetUp() override {
     EtwTraceProperties ignore;
     EtwTraceController::Stop(session_name_.c_str(), &ignore);
 
     // Allocate a new provider name GUID for each test.
     ASSERT_HRESULT_SUCCEEDED(::CoCreateGuid(&test_provider_));
   }
 
@@ skipping 113 matching lines @@
     provider.WaitForCallback();
 
     // Session should have wound down.
     EXPECT_EQ(0, provider.enable_level());
     EXPECT_EQ(0, provider.enable_flags());
   }
 }
 
 }  // namespace win
 }  // namespace base