SkTDynamicHash: remove need for Equals(const T&, const Key&) param.

src/core/SkScaledImageCache.cpp

Index: src/core/SkScaledImageCache.cpp
diff --git a/src/core/SkScaledImageCache.cpp b/src/core/SkScaledImageCache.cpp
index c436417f281b7463737c27bb31be758c8423ff7c..8320b921816c6fe526455abf26776a9888283cf5 100644
--- a/src/core/SkScaledImageCache.cpp
+++ b/src/core/SkScaledImageCache.cpp
@@ -144,16 +144,13 @@ uint32_t hash_from_key(const SkScaledImageCache::Key& key) {
     return key.fHash;
 }
 
-bool eq_rec_key(const SkScaledImageCache::Rec& rec, const SkScaledImageCache::Key& key) {
-    return rec.fKey == key;
-}
-}
+}  // namespace
 
 class SkScaledImageCache::Hash : public SkTDynamicHash<SkScaledImageCache::Rec,
                                                        SkScaledImageCache::Key,
                                                        key_from_rec,
-                                                       hash_from_key,
-                                                       eq_rec_key> {};
+                                                       hash_from_key> {};
+
 
 ///////////////////////////////////////////////////////////////////////////////