Fixed the clang warning for ApmDataDumper

webrtc/modules/audio_processing/logging/apm_data_dumper.cc

Index: webrtc/modules/audio_processing/logging/apm_data_dumper.cc
diff --git a/webrtc/modules/audio_processing/logging/apm_data_dumper.cc b/webrtc/modules/audio_processing/logging/apm_data_dumper.cc
index 491196e09729804af564af859146fdb08c9a1fe3..3202006d3c5e498413768d4d2a31069f2808d921 100644
--- a/webrtc/modules/audio_processing/logging/apm_data_dumper.cc
+++ b/webrtc/modules/audio_processing/logging/apm_data_dumper.cc
@@ -38,6 +38,15 @@ std::string FormFileName(const char* name,
 }  // namespace
 
 #if WEBRTC_AEC_DEBUG_DUMP == 1
+ApmDataDumper::ApmDataDumper(int instance_index)
+    : instance_index_(instance_index) {}
+#else
+ApmDataDumper::ApmDataDumper(int instance_index) {}
+#endif
+
+ApmDataDumper::~ApmDataDumper() {}
+
+#if WEBRTC_AEC_DEBUG_DUMP == 1
 FILE* ApmDataDumper::GetRawFile(const char* name) {
   std::string filename =
       FormFileName(name, instance_index_, recording_set_index_, ".dat");