Pass SdpAudioFormat through Channel, without converting to CodecInst

webrtc/modules/audio_coding/codecs/mock/mock_audio_decoder_factory.h

Index: webrtc/modules/audio_coding/codecs/mock/mock_audio_decoder_factory.h
diff --git a/webrtc/modules/audio_coding/codecs/mock/mock_audio_decoder_factory.h b/webrtc/modules/audio_coding/codecs/mock/mock_audio_decoder_factory.h
index f2ef1707103f5dc0ea81fbbdbf19cdba28a4c524..5b9ce62092a3550d706f026e5af368e30548ec3b 100644
--- a/webrtc/modules/audio_coding/codecs/mock/mock_audio_decoder_factory.h
+++ b/webrtc/modules/audio_coding/codecs/mock/mock_audio_decoder_factory.h
@@ -15,6 +15,7 @@
 
 #include "webrtc/base/scoped_ref_ptr.h"
 #include "webrtc/modules/audio_coding/codecs/audio_decoder_factory.h"
+#include "webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.h"
 #include "webrtc/test/gmock.h"
 
 namespace webrtc {
@@ -22,6 +23,7 @@ namespace webrtc {
 class MockAudioDecoderFactory : public AudioDecoderFactory {
  public:
   MOCK_METHOD0(GetSupportedDecoders, std::vector<AudioCodecSpec>());
+  MOCK_METHOD1(IsSupportedDecoder, bool(const SdpAudioFormat&));
   std::unique_ptr<AudioDecoder> MakeAudioDecoder(
       const SdpAudioFormat& format) {
     std::unique_ptr<AudioDecoder> return_value;
@@ -46,10 +48,33 @@ class MockAudioDecoderFactory : public AudioDecoderFactory {
     ON_CALL(*factory.get(), GetSupportedDecoders())
         .WillByDefault(Return(std::vector<webrtc::AudioCodecSpec>()));
     EXPECT_CALL(*factory.get(), GetSupportedDecoders()).Times(AnyNumber());
+    ON_CALL(*factory, IsSupportedDecoder(_)).WillByDefault(Return(false));
+    EXPECT_CALL(*factory, IsSupportedDecoder(_)).Times(AnyNumber());
     EXPECT_CALL(*factory.get(), MakeAudioDecoderMock(_, _)).Times(0);
     return factory;
   }
 
+  // Like CreateUnusedFactory(), but its IsSupportedDecoder() methods claims to
+  // support the same set of codecs as BuiltinAudioDecoderFactory.
+  static rtc::scoped_refptr<webrtc::MockAudioDecoderFactory>
+  CreateUnusedPotemkinFactory() {
+    using testing::_;
+
+    rtc::scoped_refptr<webrtc::MockAudioDecoderFactory> factory =
+        new rtc::RefCountedObject<webrtc::MockAudioDecoderFactory>;
+    ON_CALL(*factory, GetSupportedDecoders())
+        .WillByDefault(testing::Return(std::vector<webrtc::AudioCodecSpec>()));
+    EXPECT_CALL(*factory, GetSupportedDecoders()).Times(testing::AnyNumber());
+    ON_CALL(*factory, IsSupportedDecoder(_))
+        .WillByDefault(testing::Invoke([](const SdpAudioFormat& format) {
+          return webrtc::CreateBuiltinAudioDecoderFactory()->IsSupportedDecoder(
+              format);
+        }));
+    EXPECT_CALL(*factory, IsSupportedDecoder(_)).Times(testing::AnyNumber());
+    EXPECT_CALL(*factory, MakeAudioDecoderMock(_, _)).Times(0);
+    return factory;
+  }
+
   // Creates a MockAudioDecoderFactory with no formats that may be invoked to
   // create a codec any number of times. It will, though, return nullptr on each
   // call, since it supports no codecs.
@@ -65,6 +90,8 @@ class MockAudioDecoderFactory : public AudioDecoderFactory {
     ON_CALL(*factory.get(), GetSupportedDecoders())
         .WillByDefault(Return(std::vector<webrtc::AudioCodecSpec>()));
     EXPECT_CALL(*factory.get(), GetSupportedDecoders()).Times(AnyNumber());
+    ON_CALL(*factory, IsSupportedDecoder(_)).WillByDefault(Return(false));
+    EXPECT_CALL(*factory, IsSupportedDecoder(_)).Times(AnyNumber());
     ON_CALL(*factory.get(), MakeAudioDecoderMock(_, _))
         .WillByDefault(SetArgPointee<1>(nullptr));
     EXPECT_CALL(*factory.get(), MakeAudioDecoderMock(_, _)).Times(AnyNumber());