Check-in rlz code to src\rlz from http://code.google.com/p/rlz/.

rlz/lib/assert.h

Index: rlz/lib/assert.h
===================================================================
--- rlz/lib/assert.h	(revision 0)
+++ rlz/lib/assert.h	(revision 0)
@@ -0,0 +1,53 @@
+// Copyright (c) 2012 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.
+//
+// Macros specific to the RLZ library.
+
+#ifndef RLZ_LIB_ASSERT_H_
+#define RLZ_LIB_ASSERT_H_
+
+#include <string>
+#include "base/logging.h"
+
+// An assertion macro.
+// Can mute expected assertions in debug mode.
+
+#ifndef ASSERT_STRING
+  #ifndef MUTE_EXPECTED_ASSERTS
+    #define ASSERT_STRING(expr) LOG_IF(FATAL, false) << (expr)
+  #else
+    #define ASSERT_STRING(expr) \
+      do { \
+        std::string expr_string(expr); \
+        if (rlz_lib::expected_assertion_ != expr_string) { \
+          LOG_IF(FATAL, false) << (expr); \
+        } \
+      } while (0)
+  #endif
+#endif
+
+
+#ifndef VERIFY
+  #ifdef _DEBUG
+    #define VERIFY(expr) LOG_IF(FATAL, !(expr)) << #expr
+  #else
+    #define VERIFY(expr) (void)(expr)
+  #endif
+#endif
+
+namespace rlz_lib {
+
+#ifdef MUTE_EXPECTED_ASSERTS
+extern std::string expected_assertion_;
+#endif
+
+inline void SetExpectedAssertion(const char* s) {
+#ifdef MUTE_EXPECTED_ASSERTS
+  expected_assertion_ = s;
+#endif
+}
+
+}  // rlz_lib
+
+#endif  // RLZ_LIB_ASSERT_H_