Make sure that scoped_ptr<> cannot be used with ref-counted objects.

base/memory/scoped_ptr_unittest.nc

Index: base/memory/scoped_ptr_unittest.nc
diff --git a/base/memory/scoped_ptr_unittest.nc b/base/memory/scoped_ptr_unittest.nc
index 841d03c7eda9fa3f243e2d971b2a9feab7fe052d..30a332edcd469e565089f06922300fc5a3e64423 100644
--- a/base/memory/scoped_ptr_unittest.nc
+++ b/base/memory/scoped_ptr_unittest.nc
@@ -4,6 +4,7 @@
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/ref_counted.h"
 
 namespace {
 
@@ -13,6 +14,9 @@ class Parent {
 class Child : public Parent {
 };
 
+class RefCountedClass : public base::RefCountedThreadSafe<RefCountedClass> {
+};
+
 }  // namespace
 
 #if defined(NCTEST_NO_PASSAS_DOWNCAST)  // [r"invalid conversion from"]
@@ -21,4 +25,11 @@ scoped_ptr<Child> DowncastUsingPassAs(scoped_ptr<Parent> object) {
   return object.PassAs<Child>();
 }
 
+#elif defined(NCTEST_NO_REF_COUNTED_SCOPED_PTR)  // [r"creating array with negative size"]
+
+// scoped_ptr<> should not work for ref-counted objects.
+void WontCompile() {
+  scoped_ptr<RefCountedClass> x;
+}
+
 #endif