Update audio code to use size_t more correctly, webrtc/common_audio/ portion.

webrtc/common_audio/vad/vad_filterbank_unittest.cc

 /*
  *  Copyright (c) 2012 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 20 matching lines @@
       1479, 1385, 1291, 1200, 1103, 1099,
       1732, 1692, 1681, 1629, 1436, 1436
   };
   static const int16_t kOffsetVector[kNumChannels] = {
       368, 368, 272, 176, 176, 176 };
   int16_t features[kNumChannels];
 
   // Construct a speech signal that will trigger the VAD in all modes. It is
   // known that (i * i) will wrap around, but that doesn't matter in this case.
   int16_t speech[kMaxFrameLength];
-  for (int16_t i = 0; i < kMaxFrameLength; ++i) {
+  for (size_t i = 0; i < kMaxFrameLength; ++i) {
     speech[i] = static_cast<int16_t>(i * i);
   }
 
   int frame_length_index = 0;
   ASSERT_EQ(0, WebRtcVad_InitCore(self));
   for (size_t j = 0; j < kFrameLengthsSize; ++j) {
     if (ValidRatesAndFrameLengths(8000, kFrameLengths[j])) {
       EXPECT_EQ(kReference[frame_length_index],
                 WebRtcVad_CalculateFeatures(self, speech, kFrameLengths[j],
                                             features));
@@ skipping 14 matching lines @@
       EXPECT_EQ(0, WebRtcVad_CalculateFeatures(self, speech, kFrameLengths[j],
                                                features));
       for (int k = 0; k < kNumChannels; ++k) {
         EXPECT_EQ(kOffsetVector[k], features[k]);
       }
     }
   }
 
   // Verify that all ones in gives kOffsetVector out. Any other constant input
   // will have a small impact in the sub bands.
-  for (int16_t i = 0; i < kMaxFrameLength; ++i) {
+  for (size_t i = 0; i < kMaxFrameLength; ++i) {
     speech[i] = 1;
   }
   for (size_t j = 0; j < kFrameLengthsSize; ++j) {
     if (ValidRatesAndFrameLengths(8000, kFrameLengths[j])) {
       ASSERT_EQ(0, WebRtcVad_InitCore(self));
       EXPECT_EQ(0, WebRtcVad_CalculateFeatures(self, speech, kFrameLengths[j],
                                                features));
       for (int k = 0; k < kNumChannels; ++k) {
         EXPECT_EQ(kOffsetVector[k], features[k]);
       }
     }
   }
 
   free(self);
 }
 }  // namespace