SkTHash: hash from fnptr to functor type

tests/ChecksumTest.cpp

Index: tests/ChecksumTest.cpp
diff --git a/tests/ChecksumTest.cpp b/tests/ChecksumTest.cpp
index 0302ea98861c1a91df65e38fd5a54313d1ed2a21..c095a5ac11d356b4d0c7f4be0c9dccf8259e3f6a 100644
--- a/tests/ChecksumTest.cpp
+++ b/tests/ChecksumTest.cpp
@@ -52,14 +52,14 @@ DEF_TEST(Checksum, r) {
 }
 
 DEF_TEST(GoodHash, r) {
-    ASSERT(SkGoodHash(( int32_t)4) ==  614249093);  // 4 bytes.  Hits SkChecksum::Mix fast path.
-    ASSERT(SkGoodHash((uint32_t)4) ==  614249093);  // (Ditto)
+    ASSERT(SkGoodHash()(( int32_t)4) ==  614249093);  // 4 bytes.  Hits SkChecksum::Mix fast path.
+    ASSERT(SkGoodHash()((uint32_t)4) ==  614249093);  // (Ditto)
 
     // None of these are 4 byte sized, so they use SkChecksum::Murmur3, not SkChecksum::Mix.
-    ASSERT(SkGoodHash((uint64_t)4) == 3491892518);
-    ASSERT(SkGoodHash((uint16_t)4) ==  899251846);
-    ASSERT(SkGoodHash( (uint8_t)4) ==  962700458);
+    ASSERT(SkGoodHash()((uint64_t)4) == 3491892518);
+    ASSERT(SkGoodHash()((uint16_t)4) ==  899251846);
+    ASSERT(SkGoodHash()( (uint8_t)4) ==  962700458);
 
     // Tests SkString is correctly specialized.
-    ASSERT(SkGoodHash(SkString("Hi")) == 55667557);
+    ASSERT(SkGoodHash()(SkString("Hi")) == 55667557);
 }