`ExperimentalNs` removed + APM not depending anymore on `webrtc::Config`

Thanks to the elimination of `ExperimentalNs`, there is no need anymore
to pass `webrtc::Config` to build APM.
Hence, `AudioProcessingBuilder::Create(const webrtc::Config&)` is also
removed.

Bug: webrtc:5298
Change-Id: I0a3482376a7753434486fe564681f7b9f83939c5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/232128
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35025}
diff --git a/modules/audio_processing/audio_processing_impl_unittest.cc b/modules/audio_processing/audio_processing_impl_unittest.cc
index c68ce41..5354f54 100644
--- a/modules/audio_processing/audio_processing_impl_unittest.cc
+++ b/modules/audio_processing/audio_processing_impl_unittest.cc
@@ -35,8 +35,7 @@
 
 class MockInitialize : public AudioProcessingImpl {
  public:
-  explicit MockInitialize(const webrtc::Config& config)
-      : AudioProcessingImpl(config) {}
+  MockInitialize() : AudioProcessingImpl() {}
 
   MOCK_METHOD(void, InitializeLocked, (), (override));
   void RealInitializeLocked() {
@@ -132,12 +131,11 @@
 }  // namespace
 
 TEST(AudioProcessingImplTest, AudioParameterChangeTriggersInit) {
-  webrtc::Config webrtc_config;
-  MockInitialize mock(webrtc_config);
-  ON_CALL(mock, InitializeLocked())
+  MockInitialize mock;
+  ON_CALL(mock, InitializeLocked)
       .WillByDefault(Invoke(&mock, &MockInitialize::RealInitializeLocked));
 
-  EXPECT_CALL(mock, InitializeLocked()).Times(1);
+  EXPECT_CALL(mock, InitializeLocked).Times(1);
   mock.Initialize();
 
   constexpr size_t kMaxSampleRateHz = 32000;
@@ -146,20 +144,20 @@
   frame.fill(0);
   StreamConfig config(16000, 1, /*has_keyboard=*/false);
   // Call with the default parameters; there should be an init.
-  EXPECT_CALL(mock, InitializeLocked()).Times(0);
+  EXPECT_CALL(mock, InitializeLocked).Times(0);
   EXPECT_NOERR(mock.ProcessStream(frame.data(), config, config, frame.data()));
   EXPECT_NOERR(
       mock.ProcessReverseStream(frame.data(), config, config, frame.data()));
 
   // New sample rate. (Only impacts ProcessStream).
   config = StreamConfig(32000, 1, /*has_keyboard=*/false);
-  EXPECT_CALL(mock, InitializeLocked()).Times(1);
+  EXPECT_CALL(mock, InitializeLocked).Times(1);
   EXPECT_NOERR(mock.ProcessStream(frame.data(), config, config, frame.data()));
 
   // New number of channels.
   // TODO(peah): Investigate why this causes 2 inits.
   config = StreamConfig(32000, 2, /*has_keyboard=*/false);
-  EXPECT_CALL(mock, InitializeLocked()).Times(2);
+  EXPECT_CALL(mock, InitializeLocked).Times(2);
   EXPECT_NOERR(mock.ProcessStream(frame.data(), config, config, frame.data()));
   // ProcessStream sets num_channels_ == num_output_channels.
   EXPECT_NOERR(
@@ -167,7 +165,7 @@
 
   // A new sample rate passed to ProcessReverseStream should cause an init.
   config = StreamConfig(16000, 2, /*has_keyboard=*/false);
-  EXPECT_CALL(mock, InitializeLocked()).Times(1);
+  EXPECT_CALL(mock, InitializeLocked).Times(1);
   EXPECT_NOERR(
       mock.ProcessReverseStream(frame.data(), config, config, frame.data()));
 }
@@ -605,7 +603,7 @@
 // config should be bit-exact with running APM with said submodules disabled.
 // This mainly tests that SetCreateOptionalSubmodulesForTesting has an effect.
 TEST(ApmWithSubmodulesExcludedTest, BitexactWithDisabledModules) {
-  auto apm = rtc::make_ref_counted<AudioProcessingImpl>(webrtc::Config());
+  auto apm = rtc::make_ref_counted<AudioProcessingImpl>();
   ASSERT_EQ(apm->Initialize(), AudioProcessing::kNoError);
 
   ApmSubmoduleCreationOverrides overrides;
@@ -653,7 +651,7 @@
 // Disable transient suppressor creation and run APM in ways that should trigger
 // calls to the transient suppressor API.
 TEST(ApmWithSubmodulesExcludedTest, ReinitializeTransientSuppressor) {
-  auto apm = rtc::make_ref_counted<AudioProcessingImpl>(webrtc::Config());
+  auto apm = rtc::make_ref_counted<AudioProcessingImpl>();
   ASSERT_EQ(apm->Initialize(), kNoErr);
 
   ApmSubmoduleCreationOverrides overrides;
@@ -714,7 +712,7 @@
 // Disable transient suppressor creation and run APM in ways that should trigger
 // calls to the transient suppressor API.
 TEST(ApmWithSubmodulesExcludedTest, ToggleTransientSuppressor) {
-  auto apm = rtc::make_ref_counted<AudioProcessingImpl>(webrtc::Config());
+  auto apm = rtc::make_ref_counted<AudioProcessingImpl>();
   ASSERT_EQ(apm->Initialize(), AudioProcessing::kNoError);
 
   ApmSubmoduleCreationOverrides overrides;