Don't link with audio codecs that we don't use

webrtc/modules/audio_coding/neteq/neteq_unittest.cc

Index: webrtc/modules/audio_coding/neteq/neteq_unittest.cc
diff --git a/webrtc/modules/audio_coding/neteq/neteq_unittest.cc b/webrtc/modules/audio_coding/neteq/neteq_unittest.cc
index 8a560dc200a4f2923d2b1622859a239c8c180db7..6dfcac0d3a3f07ee910dec403a133e9fd5990af4 100644
--- a/webrtc/modules/audio_coding/neteq/neteq_unittest.cc
+++ b/webrtc/modules/audio_coding/neteq/neteq_unittest.cc
@@ -307,18 +307,20 @@ void NetEqDecodingTest::LoadDecoders() {
   ASSERT_EQ(0, neteq_->RegisterPayloadType(kDecoderPCMu, 0));
   // Load PCMa.
   ASSERT_EQ(0, neteq_->RegisterPayloadType(kDecoderPCMa, 8));
-#ifndef WEBRTC_ANDROID
+#ifdef WEBRTC_CODEC_ILBC
   // Load iLBC.
   ASSERT_EQ(0, neteq_->RegisterPayloadType(kDecoderILBC, 102));
-#endif  // WEBRTC_ANDROID
+#endif
+#if defined(WEBRTC_CODEC_ISAC) || defined(WEBRTC_CODEC_ISACFX)
   // Load iSAC.
   ASSERT_EQ(0, neteq_->RegisterPayloadType(kDecoderISAC, 103));
-#ifndef WEBRTC_ANDROID
+#endif
+#ifdef WEBRTC_CODEC_ISAC
   // Load iSAC SWB.
   ASSERT_EQ(0, neteq_->RegisterPayloadType(kDecoderISACswb, 104));
   // Load iSAC FB.
   ASSERT_EQ(0, neteq_->RegisterPayloadType(kDecoderISACfb, 105));
-#endif  // WEBRTC_ANDROID
+#endif
   // Load PCM16B nb.
   ASSERT_EQ(0, neteq_->RegisterPayloadType(kDecoderPCM16B, 93));
   // Load PCM16B wb.
@@ -441,8 +443,15 @@ void NetEqDecodingTest::PopulateCng(int frame_index,
   *payload_len = 1;  // Only noise level, no spectral parameters.
 }
 
+#if (defined(WEBRTC_CODEC_ISAC) || defined(WEBRTC_CODEC_ISAC)) && \
+    defined(WEBRTC_CODEC_ILBC) && defined(WEBRTC_CODEC_G722)
+#define IF_ALL_CODECS(x) x
+#else
+#define IF_ALL_CODECS(x) DISABLED_##x
+#endif
+
 TEST_F(NetEqDecodingTest,
-       DISABLED_ON_IOS(DISABLED_ON_ANDROID(TestBitExactness))) {
+       DISABLED_ON_IOS(DISABLED_ON_ANDROID(IF_ALL_CODECS(TestBitExactness)))) {
   const std::string input_rtp_file = webrtc::test::ProjectRootPath() +
       "resources/audio_coding/neteq_universal_new.rtp";
   // Note that neteq4_universal_ref.pcm and neteq4_universal_ref_win_32.pcm
@@ -820,7 +829,13 @@ TEST_F(NetEqDecodingTest, UnknownPayloadType) {
   EXPECT_EQ(NetEq::kUnknownRtpPayloadType, neteq_->LastError());
 }
 
-TEST_F(NetEqDecodingTest, DISABLED_ON_ANDROID(DecoderError)) {
+#if defined(WEBRTC_CODEC_ISAC) || defined(WEBRTC_CODEC_ISACFX)
+#define IF_ISAC(x) x
+#else
+#define IF_ISAC(x) DISABLED_##x
+#endif
+
+TEST_F(NetEqDecodingTest, DISABLED_ON_ANDROID(IF_ISAC(DecoderError))) {
   const size_t kPayloadBytes = 100;
   uint8_t payload[kPayloadBytes] = {0};
   WebRtcRTPHeader rtp_info;
@@ -1051,7 +1066,7 @@ TEST_F(NetEqBgnTestFade, RunTest) {
   CheckBgn(32000);
 }
 
-TEST_F(NetEqDecodingTest, SyncPacketInsert) {
+TEST_F(NetEqDecodingTest, IF_ISAC(SyncPacketInsert)) {
   WebRtcRTPHeader rtp_info;
   uint32_t receive_timestamp = 0;
   // For the readability use the following payloads instead of the defaults of