Wrap MSVC-specific pragmas. As -Wunknown-pragmas has been disabled for wtf,...

chrome/common/logging_chrome.cc

 // Copyright (c) 2006-2008 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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include <iostream>
 #include <fstream>
 
 #include "chrome/common/logging_chrome.h"
 
 #include "base/command_line.h"
+#include "base/compiler_specific.h"
 #include "base/debug_util.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/sys_info.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/env_vars.h"
 
 // When true, this means that error dialogs should not be shown.
 static bool dialogs_are_suppressed_ = false;
 
 // This should be true for exactly the period between the end of
 // InitChromeLogging() and the beginning of CleanupChromeLogging().
 static bool chrome_logging_initialized_ = false;
 
 // Assertion handler for logging errors that occur when dialogs are
 // silenced.  To record a new error, pass the log string associated
 // with that error in the str parameter.
-#pragma optimize("", off)
+MSVC_DISABLE_OPTIMIZE();
 static void SilentRuntimeAssertHandler(const std::string& str) {
   DebugUtil::BreakDebugger();
 }
-#pragma optimize("", on)
+MSVC_ENABLE_OPTIMIZE();
 
 // Suppresses error/assertion dialogs and enables the logging of
 // those errors into silenced_errors_.
 static void SuppressDialogs() {
   if (dialogs_are_suppressed_)
     return;
 
   logging::SetLogAssertHandler(SilentRuntimeAssertHandler);
 
 #if defined(OS_WIN)
@@ skipping 138 matching lines @@
       ++assertion_count;
     }
   }
   log_file.close();
 
   return assertion_count;
 }
 
 } // namespace logging