Revert of SK_DECLARE_STATIC_MUTEX -> static SkMutex

dm/DM.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "CrashHandler.h"
 #include "DMJsonWriter.h"
 #include "DMSrcSink.h"
@@ skipping 86 matching lines @@
     if (!FLAGS_quiet) {
         printf(fmt, args...);
     }
 }
 static void info(const char* fmt) {
     if (!FLAGS_quiet) {
         printf("%s", fmt);  // Clang warns printf(fmt) is insecure.
     }
 }
 
-static SkMutex gFailuresMutex;
+SK_DECLARE_STATIC_MUTEX(gFailuresMutex);
 static SkTArray<SkString> gFailures;
 
 static void fail(const SkString& err) {
     SkAutoMutexAcquire lock(gFailuresMutex);
     SkDebugf("\n\nFAILURE: %s\n\n", err.c_str());
     gFailures.push_back(err);
 }
 
 
 // We use a spinlock to make locking this in a signal handler _somewhat_ safe.
@@ skipping 1325 matching lines @@
 #endif
 }
 } // namespace skiatest
 
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif