Mac: Introduce "StaticCast" variants of base::mac::FooCastStrict, which do not typecheck in Release

base/mac/foundation_util.mm

Index: base/mac/foundation_util.mm
diff --git a/base/mac/foundation_util.mm b/base/mac/foundation_util.mm
index 6ae5df3389977a2268567f062d540d5d11418434..d004ec720a8e18054e2df4337df7b69ccfada575 100644
--- a/base/mac/foundation_util.mm
+++ b/base/mac/foundation_util.mm
@@ -342,13 +342,6 @@ CFCast<TypeCF##Ref>(const CFTypeRef& cf_val) { \
     return (TypeCF##Ref)(cf_val); \
   } \
   return NULL; \
-} \
-\
-template<> TypeCF##Ref \
-CFCastStrict<TypeCF##Ref>(const CFTypeRef& cf_val) { \
-  TypeCF##Ref rv = CFCast<TypeCF##Ref>(cf_val); \
-  DCHECK(cf_val == NULL || rv); \
-  return rv; \
 }
 
 CF_CAST_DEFN(CFArray);
@@ -393,13 +386,6 @@ CFCast<CTFontRef>(const CFTypeRef& cf_val) {
   }
   return NULL;
 }
-
-template<> CTFontRef
-CFCastStrict<CTFontRef>(const CFTypeRef& cf_val) {
-  CTFontRef rv = CFCast<CTFontRef>(cf_val);
-  DCHECK(cf_val == NULL || rv);
-  return rv;
-}
 #endif
 
 #if !defined(OS_IOS)