Revert of SK_DECLARE_STATIC_MUTEX -> static SkMutex

src/core/SkResourceCache.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 "SkChecksum.h"
 #include "SkMessageBus.h"
 #include "SkMipMap.h"
@@ skipping 524 matching lines @@
 void SkResourceCache::checkMessages() {
     SkTArray<PurgeSharedIDMessage> msgs;
     fPurgeSharedIDInbox.poll(&msgs);
     for (int i = 0; i < msgs.count(); ++i) {
         this->purgeSharedID(msgs[i].fSharedID);
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-static SkMutex gMutex;
+SK_DECLARE_STATIC_MUTEX(gMutex);
 static SkResourceCache* gResourceCache = nullptr;
 
 /** Must hold gMutex when calling. */
 static SkResourceCache* get_cache() {
     // gMutex is always held when this is called, so we don't need to be fancy in here.
     gMutex.assertHeld();
     if (nullptr == gResourceCache) {
 #ifdef SK_USE_DISCARDABLE_SCALEDIMAGECACHE
         gResourceCache = new SkResourceCache(SkDiscardableMemory::Create);
 #else
@@ skipping 134 matching lines @@
         dump->dumpNumericValue(dumpName.c_str(), "size", "bytes", rec.bytesUsed());
         dump->setMemoryBacking(dumpName.c_str(), "malloc", nullptr);
     }
 }
 
 void SkResourceCache::DumpMemoryStatistics(SkTraceMemoryDump* dump) {
     // Since resource could be backed by malloc or discardable, the cache always dumps detailed
     // stats to be accurate.
     VisitAll(sk_trace_dump_visitor, dump);
 }