Fix the maximum native sample rate in AudioProcessing

BUG=webrtc:4983
R=andrew@webrtc.org, henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1338833002 .

Cr-Commit-Position: refs/heads/master@{#10037}
diff --git a/webrtc/modules/audio_processing/include/audio_processing.h b/webrtc/modules/audio_processing/include/audio_processing.h
index 445d5c8..5eb3b62 100644
--- a/webrtc/modules/audio_processing/include/audio_processing.h
+++ b/webrtc/modules/audio_processing/include/audio_processing.h
@@ -15,6 +15,7 @@
 #include <stdio.h>  // FILE
 #include <vector>
 
+#include "webrtc/base/arraysize.h"
 #include "webrtc/base/platform_file.h"
 #include "webrtc/common.h"
 #include "webrtc/modules/audio_processing/beamformer/array_util.h"
@@ -128,8 +129,6 @@
   bool enabled;
 };
 
-static const int kAudioProcMaxNativeSampleRateHz = 32000;
-
 // The Audio Processing Module (APM) provides a collection of voice processing
 // components designed for real-time communications software.
 //
@@ -471,6 +470,11 @@
     kSampleRate48kHz = 48000
   };
 
+  static const int kNativeSampleRatesHz[];
+  static const size_t kNumNativeSampleRates;
+  static const int kMaxNativeSampleRateHz;
+  static const int kMaxAECMSampleRateHz;
+
   static const int kChunkSizeMs = 10;
 };