Skip parameter replacements where old text != old name.

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 namespace not_blink {
 
 void function(int x) {}
 
 class Class {
  public:
@@ skipping 122 matching lines @@
     Class c;
     c.f(x);
     // Non-Blink should stay the same.
     not_blink::Class c2;
     c2.method(x);
   }
 };
 
 }  // namespace test_template_arg_is_method_template_in_member_context
 
+namespace test_unnamed_arg {
+
+template <typename T>
+class Class {
+ public:
+  // Test for https://crbug.com/598141 - shouldn't rewrite
+  //    ...int);
+  // into
+  //    ...intdata_size;
+  void f(int);
+};
+
+template <typename T>
+void Class<T>::f(int dataSize){};
+
+void foo() {
+  Class<char>().f(123);
+};
+
+}  // namespace test_unnamed_arg
+
 }  // namespace blink