use safeUnref() since the other macro is not defined in donut

core/jni/android/graphics/MaskFilter.cpp

@@ -13,7 +13,7 @@ static void ThrowIAE_IfNull(JNIEnv* env, void* ptr) {
 class SkMaskFilterGlue {
 public:
     static void destructor(JNIEnv* env, jobject, SkMaskFilter* filter) {
-        SkSafeUnref(filter);
+        filter->safeUnref();
     }
 
     static SkMaskFilter* createBlur(JNIEnv* env, jobject, float radius, int blurStyle) {

core/jni/android/graphics/Shader.cpp

@@ -43,7 +43,7 @@ static int Color_HSVToColor(JNIEnv* env, jobject, int alpha, jfloatArray hsvArra
 
 static void Shader_destructor(JNIEnv* env, jobject, SkShader* shader)
 {
-    SkSafeUnref(shader);
+    shader->safeUnref();
 }
 
 static bool Shader_getLocalMatrix(JNIEnv* env, jobject, const SkShader* shader, SkMatrix* matrix)