Fix more disabled MSVC warnings, base/ edition.

base/logging_win.cc

 // Copyright (c) 2011 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 "base/logging_win.h"
 #include "base/memory/singleton.h"
 #include <initguid.h>  // NOLINT
 
 namespace logging {
 
@@ skipping 26 matching lines @@
         level = TRACE_LEVEL_WARNING;
         break;
       case LOG_ERROR:
         level = TRACE_LEVEL_ERROR;
         break;
       case LOG_FATAL:
         level = TRACE_LEVEL_FATAL;
         break;
     }
   } else {  // severity < 0 is VLOG verbosity levels.
-    level = TRACE_LEVEL_INFORMATION - severity;
+    level = static_cast<EtwEventLevel>(TRACE_LEVEL_INFORMATION - severity);
   }
 
   // Bail if we're not logging, not at that level,
   // or if we're post-atexit handling.
   LogEventProvider* provider = LogEventProvider::GetInstance();
   if (provider == NULL || level > provider->enable_level())
     return false;
 
   // And now log the event.
   if (provider->enable_flags() & ENABLE_LOG_MESSAGE_ONLY) {
@@ skipping 71 matching lines @@
     SetMinLogLevel(TRACE_LEVEL_INFORMATION - level);
   }
 }
 
 void LogEventProvider::OnEventsDisabled() {
   // Restore the old log level.
   SetMinLogLevel(old_log_level_);
 }
 
 }  // namespace logging