clang/win: Build chromium_code with -Wunused-function

win8/metro_driver/metro_driver.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.
 
 #include "stdafx.h"
 #include "win8/metro_driver/metro_driver.h"
 
 #include <roerrorapi.h>
 #include <shobjidl.h>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/logging_win.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/windows_version.h"
 #include "win8/metro_driver/winrt_utils.h"
 
 namespace {
 
+#if !defined(NDEBUG)
 LONG WINAPI ErrorReportingHandler(EXCEPTION_POINTERS* ex_info) {
   // See roerrorapi.h for a description of the
   // exception codes and parameters.
   DWORD code = ex_info->ExceptionRecord->ExceptionCode;
   ULONG_PTR* info = ex_info->ExceptionRecord->ExceptionInformation;
   if (code == EXCEPTION_RO_ORIGINATEERROR) {
     base::string16 msg(reinterpret_cast<wchar_t*>(info[2]), info[1]);
     LOG(ERROR) << "VEH: Metro error 0x" << std::hex << info[0] << ": " << msg;
   } else if (code == EXCEPTION_RO_TRANSFORMERROR) {
     base::string16 msg(reinterpret_cast<wchar_t*>(info[3]), info[2]);
     LOG(ERROR) << "VEH: Metro old error 0x" << std::hex << info[0]
                << " new error 0x" << info[1] << ": " << msg;
   }
 
   return EXCEPTION_CONTINUE_SEARCH;
 }
+#endif
 
 void SetMetroReportingFlags() {
 #if !defined(NDEBUG)
   // Set the error reporting flags to always raise an exception,
   // which is then processed by our vectored exception handling
   // above to log the error message.
   winfoundtn::Diagnostics::SetErrorReportingFlags(
       winfoundtn::Diagnostics::UseSetErrorInfo |
       winfoundtn::Diagnostics::ForceExceptions);
 #endif
@@ skipping 77 matching lines @@
 extern "C" __declspec(dllexport)
 HRESULT ActivateApplication(const wchar_t* app_id) {
   base::win::ScopedComPtr<IApplicationActivationManager> activator;
   HRESULT hr = activator.CreateInstance(CLSID_ApplicationActivationManager);
   if (SUCCEEDED(hr)) {
     DWORD pid = 0;
     hr = activator->ActivateApplication(app_id, L"", AO_NONE, &pid);
   }
   return hr;
 }