Fix componene debug build failure in chromium

include/core/SkSpinlock.h

Index: include/core/SkSpinlock.h
diff --git a/include/core/SkSpinlock.h b/include/core/SkSpinlock.h
index 6edfdf0367296cd114c93c5edc02d95736320285..82a2841db6750c9f12c37e62ad9215e27aadc39e 100644
--- a/include/core/SkSpinlock.h
+++ b/include/core/SkSpinlock.h
@@ -15,7 +15,7 @@
 #define SK_DECLARE_STATIC_SPINLOCK(name) namespace {} static SkPODSpinlock name
 
 // This class has no constructor and must be zero-initialized (the macro above does this).
-class SkPODSpinlock {
+class SK_API SkPODSpinlock {
 public:
     void acquire() {
         // To act as a mutex, we need an acquire barrier if we take the lock.