Modernize SkSpinlock.

src/gpu/batches/GrBatch.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrBatch.h"
 
 #include "GrMemoryPool.h"
 #include "SkSpinlock.h"
 
 // TODO I noticed a small benefit to using a larger exclusive pool for batches.  Its very small,
 // but seems to be mostly consistent.  There is a lot in flux right now, but we should really
 // revisit this when batch is everywhere
 
 
 // We use a global pool protected by a mutex(spinlock). Chrome may use the same GrContext on
 // different threads. The GrContext is not used concurrently on different threads and there is a
 // memory barrier between accesses of a context on different threads. Also, there may be multiple
 // GrContexts and those contexts may be in use concurrently on different threads.
 namespace {
-SK_DECLARE_STATIC_SPINLOCK(gBatchSpinlock);
+static SkSpinlock gBatchSpinlock;
 class MemoryPoolAccessor {
 public:
     MemoryPoolAccessor() { gBatchSpinlock.acquire(); }
 
     ~MemoryPoolAccessor() { gBatchSpinlock.release(); }
 
     GrMemoryPool* pool() const {
         static GrMemoryPool gPool(16384, 16384);
         return &gPool;
     }
@@ skipping 15 matching lines @@
 GrBatch::GrBatch(uint32_t classID)
     : fClassID(classID)
 #if GR_BATCH_SPEW
     , fUniqueID(GenBatchID())
 #endif
 {
     SkDEBUGCODE(fUsed = false;)
 }
 
 GrBatch::~GrBatch() {}