Convert channel counts to size_t.

webrtc/modules/audio_processing/beamformer/matrix_test_helpers.h

 /*
  *  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.
  */
 
@@ skipping 16 matching lines @@
 class MatrixTestHelpers {
  public:
   template <typename T>
   static void ValidateMatrixEquality(const Matrix<T>& expected,
                                      const Matrix<T>& actual) {
     EXPECT_EQ(expected.num_rows(), actual.num_rows());
     EXPECT_EQ(expected.num_columns(), actual.num_columns());
 
     const T* const* expected_elements = expected.elements();
     const T* const* actual_elements = actual.elements();
-    for (int i = 0; i < expected.num_rows(); ++i) {
-      for (int j = 0; j < expected.num_columns(); ++j) {
+    for (size_t i = 0; i < expected.num_rows(); ++i) {
+      for (size_t j = 0; j < expected.num_columns(); ++j) {
         EXPECT_EQ(expected_elements[i][j], actual_elements[i][j]);
       }
     }
   }
 
   static void ValidateMatrixEqualityFloat(const Matrix<float>& expected,
                                           const Matrix<float>& actual) {
     EXPECT_EQ(expected.num_rows(), actual.num_rows());
     EXPECT_EQ(expected.num_columns(), actual.num_columns());
 
     const float* const* expected_elements = expected.elements();
     const float* const* actual_elements = actual.elements();
-    for (int i = 0; i < expected.num_rows(); ++i) {
-      for (int j = 0; j < expected.num_columns(); ++j) {
+    for (size_t i = 0; i < expected.num_rows(); ++i) {
+      for (size_t j = 0; j < expected.num_columns(); ++j) {
         EXPECT_NEAR(expected_elements[i][j], actual_elements[i][j], kTolerance);
       }
     }
   }
 
   static void ValidateMatrixEqualityComplexFloat(
       const Matrix<complex<float> >& expected,
       const Matrix<complex<float> >& actual) {
     EXPECT_EQ(expected.num_rows(), actual.num_rows());
     EXPECT_EQ(expected.num_columns(), actual.num_columns());
 
     const complex<float>* const* expected_elements = expected.elements();
     const complex<float>* const* actual_elements = actual.elements();
-    for (int i = 0; i < expected.num_rows(); ++i) {
-      for (int j = 0; j < expected.num_columns(); ++j) {
+    for (size_t i = 0; i < expected.num_rows(); ++i) {
+      for (size_t j = 0; j < expected.num_columns(); ++j) {
         EXPECT_NEAR(expected_elements[i][j].real(),
                     actual_elements[i][j].real(),
                     kTolerance);
         EXPECT_NEAR(expected_elements[i][j].imag(),
                     actual_elements[i][j].imag(),
                     kTolerance);
       }
     }
   }
 
   static void ValidateMatrixNearEqualityComplexFloat(
       const Matrix<complex<float> >& expected,
       const Matrix<complex<float> >& actual,
       float tolerance) {
     EXPECT_EQ(expected.num_rows(), actual.num_rows());
     EXPECT_EQ(expected.num_columns(), actual.num_columns());
 
     const complex<float>* const* expected_elements = expected.elements();
     const complex<float>* const* actual_elements = actual.elements();
-    for (int i = 0; i < expected.num_rows(); ++i) {
-      for (int j = 0; j < expected.num_columns(); ++j) {
+    for (size_t i = 0; i < expected.num_rows(); ++i) {
+      for (size_t j = 0; j < expected.num_columns(); ++j) {
         EXPECT_NEAR(expected_elements[i][j].real(),
                     actual_elements[i][j].real(),
                     tolerance);
         EXPECT_NEAR(expected_elements[i][j].imag(),
                     actual_elements[i][j].imag(),
                     tolerance);
       }
     }
   }
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_MATRIX_TEST_HELPERS_H_