Revert of Adding a some checks and switching out a few assert for RTC_[D]CHECK.

webrtc/voice_engine/test/auto_test/standard/external_media_test.cc

Index: webrtc/voice_engine/test/auto_test/standard/external_media_test.cc
diff --git a/webrtc/voice_engine/test/auto_test/standard/external_media_test.cc b/webrtc/voice_engine/test/auto_test/standard/external_media_test.cc
index 4534e128b3a76da6302bc68e8f34383a0463984d..4f86010a18aa099d3970b3048d06c99bd5af11d4 100644
--- a/webrtc/voice_engine/test/auto_test/standard/external_media_test.cc
+++ b/webrtc/voice_engine/test/auto_test/standard/external_media_test.cc
@@ -107,3 +107,20 @@
   EXPECT_EQ(0, voe_xmedia_->SetExternalMixing(channel_, false));
   ResumePlaying();
 }
+
+TEST_F(ExternalMediaTest,
+       ExternalMixingResamplingToInvalidFrequenciesFails) {
+  const int kInvalidFrequencies[] = {-8000, -1};
+  webrtc::AudioFrame frame;
+  PausePlaying();
+  EXPECT_EQ(0, voe_xmedia_->SetExternalMixing(channel_, true));
+  ResumePlaying();
+  for (size_t i = 0; i < arraysize(kInvalidFrequencies); i++) {
+    int f = kInvalidFrequencies[i];
+    EXPECT_EQ(-1, voe_xmedia_->GetAudioFrame(channel_, f, &frame))
+        << "Resampling fails for freq=" << f;
+  }
+  PausePlaying();
+  EXPECT_EQ(0, voe_xmedia_->SetExternalMixing(channel_, false));
+  ResumePlaying();
+}