Adding full initial version of delay estimation functionality in echo canceller 3

webrtc/modules/audio_processing/aec3/block_processor_unittest.cc

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 229 matching lines @@
                "");
 }
 
 // Verifiers that the verification for null BufferRender input works.
 TEST(BlockProcessor, NullBufferRenderParameter) {
   EXPECT_DEATH(std::unique_ptr<BlockProcessor>(BlockProcessor::Create(8000))
                    ->BufferRender(nullptr),
                "");
 }
 
+// Verifies the check for correct sample rate.
+TEST(BlockProcessor, WrongSampleRate) {
+  EXPECT_DEATH(std::unique_ptr<BlockProcessor>(BlockProcessor::Create(8001)),
+               "");
+}
+
 #endif
 
 }  // namespace webrtc