Update a ton of audio code to use size_t more correctly and in general reduce

webrtc/common_audio/resampler/sinc_resampler_sse.cc

 /*
  *  Copyright (c) 2013 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.
  */
 
 // Modified from the Chromium original:
 // src/media/base/simd/sinc_resampler_sse.cc
 
 #include "webrtc/common_audio/resampler/sinc_resampler.h"
 
 #include <xmmintrin.h>
 
 namespace webrtc {
 
 float SincResampler::Convolve_SSE(const float* input_ptr, const float* k1,
                                   const float* k2,
                                   double kernel_interpolation_factor) {
   __m128 m_input;
   __m128 m_sums1 = _mm_setzero_ps();
   __m128 m_sums2 = _mm_setzero_ps();
 
   // Based on |input_ptr| alignment, we need to use loadu or load.  Unrolling
   // these loops hurt performance in local testing.
   if (reinterpret_cast<uintptr_t>(input_ptr) & 0x0F) {
-    for (int i = 0; i < kKernelSize; i += 4) {
+    for (size_t i = 0; i < kKernelSize; i += 4) {
       m_input = _mm_loadu_ps(input_ptr + i);
       m_sums1 = _mm_add_ps(m_sums1, _mm_mul_ps(m_input, _mm_load_ps(k1 + i)));
       m_sums2 = _mm_add_ps(m_sums2, _mm_mul_ps(m_input, _mm_load_ps(k2 + i)));
     }
   } else {
-    for (int i = 0; i < kKernelSize; i += 4) {
+    for (size_t i = 0; i < kKernelSize; i += 4) {
       m_input = _mm_load_ps(input_ptr + i);
       m_sums1 = _mm_add_ps(m_sums1, _mm_mul_ps(m_input, _mm_load_ps(k1 + i)));
       m_sums2 = _mm_add_ps(m_sums2, _mm_mul_ps(m_input, _mm_load_ps(k2 + i)));
     }
   }
 
   // Linearly interpolate the two "convolutions".
   m_sums1 = _mm_mul_ps(m_sums1, _mm_set_ps1(
       static_cast<float>(1.0 - kernel_interpolation_factor)));
   m_sums2 = _mm_mul_ps(m_sums2, _mm_set_ps1(
       static_cast<float>(kernel_interpolation_factor)));
   m_sums1 = _mm_add_ps(m_sums1, m_sums2);
 
   // Sum components together.
   float result;
   m_sums2 = _mm_add_ps(_mm_movehl_ps(m_sums1, m_sums1), m_sums1);
   _mm_store_ss(&result, _mm_add_ss(m_sums2, _mm_shuffle_ps(
       m_sums2, m_sums2, 1)));
 
   return result;
 }
 
 }  // namespace webrtc