SK_DECLARE_STATIC_MUTEX -> static SkMutex

src/core/SkPaint.cpp

Index: src/core/SkPaint.cpp
diff --git a/src/core/SkPaint.cpp b/src/core/SkPaint.cpp
index 67bbda16652ca13e043aab6d2b1bc7336e8dbc2c..c9fff0d3c239be3ca2df51f9b5d584ae9f74e941 100644
--- a/src/core/SkPaint.cpp
+++ b/src/core/SkPaint.cpp
@@ -1457,7 +1457,7 @@ void SkScalerContext::MakeRec(const SkPaint& paint,
  * cachedMaskGamma the caller must hold the gMaskGammaCacheMutex and continue
  * to hold it until the returned pointer is refed or forgotten.
  */
-SK_DECLARE_STATIC_MUTEX(gMaskGammaCacheMutex);
+static SkMutex gMaskGammaCacheMutex;
 
 static SkMaskGamma* gLinearMaskGamma = nullptr;
 static SkMaskGamma* gMaskGamma = nullptr;