Added a bitexactness test for the echo canceller in the audio processing module.

webrtc/modules/modules.gyp

 # Copyright (c) 2011 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.
 
 {
   'includes': [
@@ skipping 422 matching lines @@
                 'WEBRTC_NETEQ_UNITTEST_BITEXACT',
               ],
               'dependencies': [
                 'audioproc_protobuf_utils',
                 'audioproc_unittest_proto',
                 'neteq_unittest_proto',
               ],
               'sources': [
                 'audio_processing/audio_processing_impl_locking_unittest.cc',
                 'audio_processing/audio_processing_impl_unittest.cc',
+                'audio_processing/echo_cancellation_unittest.cc',
                 'audio_processing/high_pass_filter_bitexactness_unittest.cc',
                 'audio_processing/level_estimator_bitexactness_unittest.cc',
                 'audio_processing/noise_suppression_bitexactness_unittest.cc',
                 'audio_processing/voice_detection_unittest.cc',
                 'audio_processing/test/audio_buffer_tools.cc',
                 'audio_processing/test/audio_buffer_tools.h',
                 'audio_processing/test/audio_processing_unittest.cc',
                 'audio_processing/test/bitexactness_tools.cc',
                 'audio_processing/test/bitexactness_tools.h',
                 'audio_processing/test/debug_dump_replayer.cc',
@@ skipping 260 matching lines @@
               'sources': [
                 'video_render_tests.isolate',
               ],
             },
           ],
         }],
       ],
     }], # include_tests
   ], # conditions
 }