More switching to standard type traits

third_party/WebKit/Source/wtf/LeakAnnotations.h

Index: third_party/WebKit/Source/wtf/LeakAnnotations.h
diff --git a/third_party/WebKit/Source/wtf/LeakAnnotations.h b/third_party/WebKit/Source/wtf/LeakAnnotations.h
index 446992db6abf6cfefb9bc9473bcd08dc45da6daf..9274c909b4cfeebbee6dc33dc6e446bb65d7a9ef 100644
--- a/third_party/WebKit/Source/wtf/LeakAnnotations.h
+++ b/third_party/WebKit/Source/wtf/LeakAnnotations.h
@@ -101,7 +101,7 @@ class CanRegisterStaticLocalReference {
     } NoType;
 
     // Check if class T has public method "T* registerAsStaticReference()".
-    template<typename V> static YesType checkHasRegisterAsStaticReferenceMethod(V* p, typename EnableIf<IsSubclass<V, typename std::remove_pointer<decltype(p->registerAsStaticReference())>::type>::value>::Type* = 0);
+    template<typename V> static YesType checkHasRegisterAsStaticReferenceMethod(V* p, typename std::enable_if<std::is_base_of<V, typename std::remove_pointer<decltype(p->registerAsStaticReference())>::type>::value>::Type* = 0);

[Nico, 2015/12/09 15:09:39]

Since you're replacing IsSubclass with is_base_of here, don't you need to switch
the order of the arguments?

Since you didn't do this and things appear to work: Do we have to few tests
here? (Or maybe just too few static_assert()s?)

[Mikhail, 2015/12/10 11:38:15]

I do, thanks for noticing. Fixed in the latest patch.
I failed to find testing code for it. It's probably worth adding but IMO in a
separate patch.

     template<typename V> static NoType checkHasRegisterAsStaticReferenceMethod(...);
 
 public: