Account for the fact that some type traits have static methods.

tools/clang/rewrite_to_chrome_style/tests/fields-original.cc

Index: tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
diff --git a/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc b/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
index 52dd12e079f776c7fce795993864c6bff2c31581..9fa8dfb54a1dfc429396858dd9ccf9414881d94d 100644
--- a/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
+++ b/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
@@ -90,6 +90,36 @@ class TypeTrait2<void> {
   static const bool value = false;
 };
 
+template <typename T, typename U>
+struct IsSubclass {
+ private:
+  typedef char YesType;
+  struct NoType {
+    char padding[8];
+  };
+
+  static YesType subclassCheck(U*);
+  static NoType subclassCheck(...);
+  static T* t;
+
+ public:
+  static const bool value = sizeof(subclassCheck(t)) == sizeof(YesType);
+};
+
+template <typename U = void>
+struct IsTraceableInCollection {
+  // Expanded from STATIC_ONLY(IsTraceableInCollection):
+ private:
+  IsTraceableInCollection() = delete;
+  IsTraceableInCollection(const IsTraceableInCollection&) = delete;
+  IsTraceableInCollection& operator=(const IsTraceableInCollection&) = delete;
+  void* operator new(unsigned long) = delete;
+  void* operator new(unsigned long, void*) = delete;
+
+ public:
+  static const bool value = true;
+};
+
 };  // namespace WTF
 
 void F() {