Add flag --require-audio-hardware-for-testing.

media/audio/audio_unittest_util.cc

Index: media/audio/audio_unittest_util.cc
diff --git a/media/audio/audio_unittest_util.cc b/media/audio/audio_unittest_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0ddf94ad35f625a30e0888e32a3f95fa32114b9f
--- /dev/null
+++ b/media/audio/audio_unittest_util.cc
@@ -0,0 +1,29 @@
+// Copyright 2015 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 "media/audio/audio_unittest_util.h"
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "media/base/media_switches.h"
+
+namespace media {
+
+// For macro ABORT_AUDIO_TEST_IF_NOT.
+bool ShouldAbortAudioTest(bool requirements_satisfied,
+                          const char* requirements_expression,
+                          bool* should_fail) {
+  bool fail_if_unsatisfied = base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kRequireAudioHardwareForTesting);
+  if (!requirements_satisfied) {
+    LOG(WARNING) << "Requirement(s) not satisfied (" << requirements_expression
+                 << ")";
+    *should_fail = fail_if_unsatisfied;
+    return true;
+  }
+  *should_fail = false;
+  return false;
+}
+
+}  // namespace media