Add handling for logging and gtest comparison macros.

tools/clang/rewrite_scoped_refptr/tests/logging-checks-original.cc

+// Copyright (c) 2014 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.
+
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+
+struct Foo : public base::RefCounted<Foo> {
+  int dummy;
+};
+
+// Rewriting the logging macros is a bit tricky. The CHECK_OP macros actually
+// wrap a function where the actual comparison happens. Make sure that the tool
+// is correctly matching the AST nodes generated by the macros and generating
+// the appropriate replacements.
+void TestFunction() {
+  scoped_refptr<Foo> a;
+  Foo* b;
+
+  CHECK_EQ(a, b);
+  CHECK_EQ(b, a);
+
+  CHECK_NE(a, b);
+  CHECK_NE(b, a);
+
+  CHECK(a);
+  CHECK(!a);
+}