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

media/audio/audio_unittest_utils.h

Index: media/audio/audio_unittest_utils.h
diff --git a/media/audio/audio_unittest_utils.h b/media/audio/audio_unittest_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..b5934b5eefcce244871155bd89811e74a7249664
--- /dev/null
+++ b/media/audio/audio_unittest_utils.h
@@ -0,0 +1,21 @@
+#include "testing/gtest/include/gtest/gtest.h"

[DaleCurtis, 2015/02/09 22:10:49]

Needs license header. #ifdef protections for multiple include.

[watk, 2015/02/10 01:38:33]

Oh jeez, I forgot a lot of stuff. I put it in the media ns, and removed the
plural from 'utils' to be consistent with the rest of media/.

[watk, 2015/02/10 01:38:33]

Done.

+
+// Use in tests to either skip or fail a test when the system is missing a
+// required audio device or library. If the |kRequireAudioHardwareForTesting|

[DaleCurtis, 2015/02/09 22:10:50]

I'd use the actual --flag-name.

[watk, 2015/02/10 01:38:33]

Done.

+// flag is set, missing requirements will cause the test to fail. Otherwise it
+// will be skipped.
+#define ABORT_AUDIO_TEST_IF_NOT(requirements_satisfied)            \
+  do {                                                             \
+    bool fail = false;                                             \
+    if (should_abort_audio_test(requirements_satisfied,            \
+                                #requirements_satisfied, &fail)) { \
+      if (fail)                                                    \
+        FAIL();                                                    \
+      else                                                         \
+        return;                                                    \
+    }                                                              \
+  } while (false)
+
+bool should_abort_audio_test(bool requirements_satisfied,

[DaleCurtis, 2015/02/09 22:10:49]

Should be CamelCase method name.

[watk, 2015/02/10 01:38:33]

Done.

+                             const char* requirements_expression,
+                             bool* should_fail);