Modernize SkSpinlock.

src/gpu/GrProcessor.cpp

Index: src/gpu/GrProcessor.cpp
diff --git a/src/gpu/GrProcessor.cpp b/src/gpu/GrProcessor.cpp
index 15206c2c857ca50deaea270bbe98e4511ed8bb7c..aef51908dac7caadc09a8302de2fd13e38fa4996 100644
--- a/src/gpu/GrProcessor.cpp
+++ b/src/gpu/GrProcessor.cpp
@@ -81,7 +81,7 @@ void GrProcessorTestFactory<GrXPFactory>::VerifyFactoryCount() {
 // 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(gProcessorSpinlock);
+static SkSpinlock gProcessorSpinlock;
 class MemoryPoolAccessor {
 public:
     MemoryPoolAccessor() { gProcessorSpinlock.acquire(); }