[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/system_wrappers/source/aligned_array_unittest.cc

 /*
  *  Copyright (c) 2014 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.
  */
 
 #include "webrtc/system_wrappers/interface/aligned_array.h"
 
 #include <stdint.h>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
-bool IsAligned(const void* ptr, int alignment) {
+bool IsAligned(const void* ptr, size_t alignment) {
   return reinterpret_cast<uintptr_t>(ptr) % alignment == 0;
 }
 
 }  // namespace
 
 namespace webrtc {
 
 TEST(AlignedArrayTest, CheckAlignment) {
   AlignedArray<bool> arr(10, 7, 128);
   ASSERT_TRUE(IsAligned(arr.Array(), 128));
-  for (int i = 0; i < 10; ++i) {
+  for (size_t i = 0; i < 10; ++i) {
     ASSERT_TRUE(IsAligned(arr.Row(i), 128));
     ASSERT_EQ(arr.Row(i), arr.Array()[i]);
   }
 }
 
 TEST(AlignedArrayTest, CheckOverlap) {
   AlignedArray<size_t> arr(10, 7, 128);
 
-  for (int i = 0; i < 10; ++i) {
+  for (size_t i = 0; i < 10; ++i) {
     for (size_t j = 0; j < 7; ++j) {
       arr.At(i, j) = 20 * i + j;
     }
   }
 
-  for (int i = 0; i < 10; ++i) {
+  for (size_t i = 0; i < 10; ++i) {
     for (size_t j = 0; j < 7; ++j) {
       ASSERT_EQ(arr.At(i, j), 20 * i + j);
       ASSERT_EQ(arr.Row(i)[j], 20 * i + j);
       ASSERT_EQ(arr.Array()[i][j], 20 * i + j);
     }
   }
 }
 
 TEST(AlignedArrayTest, CheckRowsCols) {
   AlignedArray<bool> arr(10, 7, 128);
-  ASSERT_EQ(arr.rows(), 10);
+  ASSERT_EQ(arr.rows(), 10u);
   ASSERT_EQ(arr.cols(), 7u);
 }
 
 }  // namespace webrtc