Add a simple, safe gain PostProcessor.

chromecast/media/cma/backend/alsa/post_processors/governor_unittest.cc

Index: chromecast/media/cma/backend/alsa/post_processors/governor_unittest.cc
diff --git a/chromecast/media/cma/backend/alsa/post_processors/governor_unittest.cc b/chromecast/media/cma/backend/alsa/post_processors/governor_unittest.cc
index 38cac53f21d75a1196a58cd169bb864aa0b73018..d91ccc8aa298ec7979ad7ddd4f2e8cbff8b296c6 100644
--- a/chromecast/media/cma/backend/alsa/post_processors/governor_unittest.cc
+++ b/chromecast/media/cma/backend/alsa/post_processors/governor_unittest.cc
@@ -13,8 +13,6 @@
 #include "base/strings/stringprintf.h"
 #include "chromecast/media/cma/backend/alsa/post_processors/governor.h"
 #include "chromecast/media/cma/backend/alsa/post_processors/post_processor_unittest.h"
-#include "media/base/audio_bus.h"
-#include "media/base/audio_sample_types.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chromecast {
@@ -111,24 +109,24 @@ INSTANTIATE_TEST_CASE_P(GovernorClampVolumeTest,
                         ::testing::Values(0.0f, 0.1f, 0.5f, 0.9f, 1.0f, 1.1f));
 
 // Default tests from post_processor_test
-TEST_P(PostProcessorTest, TestDelay) {
+TEST_P(PostProcessorTest, GovernorDelay) {
   std::string config = MakeConfigString(1.0, 1.0);
   auto pp =
-      base::WrapUnique(AudioPostProcessorShlib_Create(config, kNumChannels));
+      base::WrapUnique<AudioPostProcessor>(new Governor(config, kNumChannels));

[kmackay, 2017/07/06 22:16:28]

Why not make this work the same way as saturated_gain_unittest.cc (ie, use the
factory to create the post processor)?

[bshaya, 2017/07/06 22:38:10]

Done.

   TestDelay(pp.get(), sample_rate_);
 }
 
-TEST_P(PostProcessorTest, TestRinging) {
+TEST_P(PostProcessorTest, GovernorRinging) {
   std::string config = MakeConfigString(1.0, 1.0);
   auto pp =
-      base::WrapUnique(AudioPostProcessorShlib_Create(config, kNumChannels));
+      base::WrapUnique<AudioPostProcessor>(new Governor(config, kNumChannels));
   TestRingingTime(pp.get(), sample_rate_);
 }
 
-TEST_P(PostProcessorTest, TestPassthrough) {
+TEST_P(PostProcessorTest, GovernorPassthrough) {
   std::string config = MakeConfigString(1.0, 1.0);
   auto pp =
-      base::WrapUnique(AudioPostProcessorShlib_Create(config, kNumChannels));
+      base::WrapUnique<AudioPostProcessor>(new Governor(config, kNumChannels));
   TestPassthrough(pp.get(), sample_rate_);
 }