[Chromecast] Fix death test failures in official builds

CHECK macro strings are dropped in official builds to save space.

BUG=594632

Change-Id: Ic53faaa7480fa3c72a75e9af9c4a658cf05b4cc4
Reviewed-on: https://chromium-review.googlesource.com/530103Reviewed-by: Stephen Lanham <slan@chromium.org>
Commit-Queue: Luke Halliwell <halliwell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#478642}

chromecast/media/cma/backend/alsa/slew_volume_unittests.cc

@@ -131,7 +131,12 @@ class SlewVolumeBaseTest : public ::testing::Test {
 };
 
 TEST_F(SlewVolumeBaseTest, BadSampleRate) {
+// String arguments aren't passed to CHECK() in official builds.
+#if defined(OFFICIAL_BUILD) && defined(NDEBUG)
+  ASSERT_DEATH(slew_volume_->SetSampleRate(0), "");
+#else
   ASSERT_DEATH(slew_volume_->SetSampleRate(0), "sample_rate");
+#endif
 }
 
 TEST_F(SlewVolumeBaseTest, BadSlewTime) {

chromecast/media/cma/backend/alsa/stream_mixer_alsa_unittest.cc

@@ -1137,14 +1137,24 @@ TEST_F(StreamMixerAlsaTest, InvalidStreamTypeCrashes) {
 }
 )json";
 
+// String arguments aren't passed to CHECK() in official builds.
+#if defined(OFFICIAL_BUILD) && defined(NDEBUG)
+  EXPECT_DEATH(StreamMixerAlsa::Get()->ResetPostProcessorsForTest(json), "");
+#else
   EXPECT_DEATH(StreamMixerAlsa::Get()->ResetPostProcessorsForTest(json),
                "foobar is not a stream type");
+#endif
 }
 
 TEST_F(StreamMixerAlsaTest, BadJsonCrashes) {
   const std::string json("{{");
+// String arguments aren't passed to CHECK() in official builds.
+#if defined(OFFICIAL_BUILD) && defined(NDEBUG)
+  EXPECT_DEATH(StreamMixerAlsa::Get()->ResetPostProcessorsForTest(json), "");
+#else
   EXPECT_DEATH(StreamMixerAlsa::Get()->ResetPostProcessorsForTest(json),
                "Invalid JSON");
+#endif
 }
 
 TEST_F(StreamMixerAlsaTest, MultiplePostProcessorsInOneStream) {