Convert channel counts to size_t.

webrtc/system_wrappers/include/aligned_array.h

Index: webrtc/system_wrappers/include/aligned_array.h
diff --git a/webrtc/system_wrappers/include/aligned_array.h b/webrtc/system_wrappers/include/aligned_array.h
index e985e8835732dceffd4b129e7478eac2fd692b44..a2ffe99c145bb49261b971b0ef372bf9f3321697 100644
--- a/webrtc/system_wrappers/include/aligned_array.h
+++ b/webrtc/system_wrappers/include/aligned_array.h
@@ -20,20 +20,20 @@ namespace webrtc {
 // aligned to the given byte alignment.
 template<typename T> class AlignedArray {
  public:
-  AlignedArray(int rows, size_t cols, size_t alignment)
+  AlignedArray(size_t rows, size_t cols, size_t alignment)
       : rows_(rows),
         cols_(cols) {
     RTC_CHECK_GT(alignment, 0u);
     head_row_ = static_cast<T**>(AlignedMalloc(rows_ * sizeof(*head_row_),
                                                alignment));
-    for (int i = 0; i < rows_; ++i) {
+    for (size_t i = 0; i < rows_; ++i) {
       head_row_[i] = static_cast<T*>(AlignedMalloc(cols_ * sizeof(**head_row_),
                                                    alignment));
     }
   }
 
   ~AlignedArray() {
-    for (int i = 0; i < rows_; ++i) {
+    for (size_t i = 0; i < rows_; ++i) {
       AlignedFree(head_row_[i]);
     }
     AlignedFree(head_row_);
@@ -47,27 +47,27 @@ template<typename T> class AlignedArray {
     return head_row_;
   }
 
-  T* Row(int row) {
+  T* Row(size_t row) {
     RTC_CHECK_LE(row, rows_);
     return head_row_[row];
   }
 
-  const T* Row(int row) const {
+  const T* Row(size_t row) const {
     RTC_CHECK_LE(row, rows_);
     return head_row_[row];
   }
 
-  T& At(int row, size_t col) {
+  T& At(size_t row, size_t col) {
     RTC_CHECK_LE(col, cols_);
     return Row(row)[col];
   }
 
-  const T& At(int row, size_t col) const {
+  const T& At(size_t row, size_t col) const {
     RTC_CHECK_LE(col, cols_);
     return Row(row)[col];
   }
 
-  int rows() const {
+  size_t rows() const {
     return rows_;
   }
 
@@ -76,7 +76,7 @@ template<typename T> class AlignedArray {
   }
 
  private:
-  int rows_;
+  size_t rows_;
   size_t cols_;
   T** head_row_;
 };