Added missing debug dump flags for the APM unit tests

webrtc/modules/BUILD.gn

 # 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.
 
 import("../build/webrtc.gni")
 import("audio_coding/audio_coding.gni")
@@ skipping 459 matching lines @@
       "video_coding/utility/quality_scaler_unittest.cc",
       "video_coding/video_coding_robustness_unittest.cc",
       "video_coding/video_packet_buffer_unittest.cc",
       "video_coding/video_receiver_unittest.cc",
       "video_coding/video_sender_unittest.cc",
       "video_processing/test/denoiser_test.cc",
       "video_processing/test/video_processing_unittest.cc",
       "video_processing/test/video_processing_unittest.h",
     ]
 
+    if (apm_debug_dump) {
+      defines += [ "WEBRTC_APM_DEBUG_DUMP=1" ]
+    } else {
+      defines += [ "WEBRTC_APM_DEBUG_DUMP=0" ]
+    }
+
     if (rtc_enable_intelligibility_enhancer) {
       defines += [ "WEBRTC_INTELLIGIBILITY_ENHANCER=1" ]
       sources += [
         "audio_processing/intelligibility/intelligibility_enhancer_unittest.cc",
         "audio_processing/intelligibility/intelligibility_utils_unittest.cc",
       ]
     } else {
       defines += [ "WEBRTC_INTELLIGIBILITY_ENHANCER=0" ]
     }
 
@@ skipping 168 matching lines @@
       sources += [
         "audio_device/ios/audio_device_unittest_ios.cc",
         "audio_device/ios/objc/RTCAudioSessionTest.mm",
         "video_coding/codecs/h264/h264_video_toolbox_nalu_unittest.cc",
       ]
 
       ldflags = [ "-ObjC" ]
     }
   }
 }