Revert of Fix getUserMedia so that failure is reported for invalid audio sources.

content/renderer/media/user_media_client_impl_unittest.cc

Index: content/renderer/media/user_media_client_impl_unittest.cc
diff --git a/content/renderer/media/user_media_client_impl_unittest.cc b/content/renderer/media/user_media_client_impl_unittest.cc
index 77214b3bb20394160c9d52bb4523f6e6e8f8bef6..41f634f55f12dfe6a793f9d8ce59a85e0fae6600 100644
--- a/content/renderer/media/user_media_client_impl_unittest.cc
+++ b/content/renderer/media/user_media_client_impl_unittest.cc
@@ -206,16 +206,9 @@
     create_source_that_fails_ = should_fail;
   }
 
-  static void SignalSourceReady(
-      const MediaStreamSource::ConstraintsCallback& source_ready,
-      MediaStreamSource* source) {
-    source_ready.Run(source, MEDIA_DEVICE_OK, "");
-  }
-
   MediaStreamAudioSource* CreateAudioSource(
       const StreamDeviceInfo& device,
-      const blink::WebMediaConstraints& constraints,
-      const MediaStreamSource::ConstraintsCallback& source_ready) override {
+      const blink::WebMediaConstraints& constraints) override {
     MediaStreamAudioSource* source;
     if (create_source_that_fails_) {
       class FailedAtLifeAudioSource : public MediaStreamAudioSource {
@@ -232,15 +225,6 @@
       source = new MediaStreamAudioSource(true);
     }
     source->SetDeviceInfo(device);
-
-    if (!create_source_that_fails_) {
-      // RunUntilIdle is required for this task to complete.
-      base::ThreadTaskRunnerHandle::Get()->PostTask(
-          FROM_HERE,
-          base::Bind(&UserMediaClientImplUnderTest::SignalSourceReady,
-                     source_ready, source));
-    }
-
     return source;
   }
 
@@ -362,7 +346,6 @@
         ms_dispatcher_->audio_input_request_id(),
         ms_dispatcher_->stream_label(), ms_dispatcher_->audio_input_array(),
         ms_dispatcher_->video_array());
-    base::RunLoop().RunUntilIdle();
   }
 
   void StartMockedVideoSource() {