Don't call exit() after __debugbreak() on release builds.

base/debug/debugger_unittest.cc

Index: base/debug/debugger_unittest.cc
diff --git a/base/debug/debugger_unittest.cc b/base/debug/debugger_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0a5a0390e8ae85af030b4a47183297b943133505
--- /dev/null
+++ b/base/debug/debugger_unittest.cc
@@ -0,0 +1,43 @@
+// Copyright 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/debug/debugger.h"
+
+#include "build/build_config.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+#if defined(GTEST_HAS_DEATH_TEST) && !defined(OS_ANDROID)
+void CrashWithBreakDebugger() {
+  base::debug::SetSuppressDebugUI(false);
+  base::debug::BreakDebugger();
+
+#if defined(OS_WIN)
+  // This should not be executed.
+  _exit(125);
+#endif
+}
+#endif  // defined(GTEST_HAS_DEATH_TEST)
+
+}  // namespace
+
+// Death tests misbehave on Android.
+#if defined(GTEST_HAS_DEATH_TEST) && !defined(OS_ANDROID)
+
+TEST(Debugger, CrashAtBreakpoint) {
+  EXPECT_DEATH(CrashWithBreakDebugger(), "");
+}
+
+#if defined(OS_WIN)
+TEST(Debugger, DoesntExecuteBeyondBreakpoint) {
+  EXPECT_EXIT(CrashWithBreakDebugger(),
+              ::testing::ExitedWithCode(0x80000003), "");
+}
+#endif  // defined(OS_WIN)
+
+#else  // defined(GTEST_HAS_DEATH_TEST) && !defined(OS_ANDROID)
+TEST(Debugger, NoTest) {
+}
+#endif  // defined(GTEST_HAS_DEATH_TEST) && !defined(OS_ANDROID)