Misc. small cleanups

webrtc/system_wrappers/source/aligned_array_unittest.cc

Index: webrtc/system_wrappers/source/aligned_array_unittest.cc
diff --git a/webrtc/system_wrappers/source/aligned_array_unittest.cc b/webrtc/system_wrappers/source/aligned_array_unittest.cc
index 8d898af03ec3cec3a7da32aca10fd55a86d893bc..eb3ad880e63d8928200f5faf2cdcbe1598cfaba6 100644
--- a/webrtc/system_wrappers/source/aligned_array_unittest.cc
+++ b/webrtc/system_wrappers/source/aligned_array_unittest.cc
@@ -16,7 +16,7 @@
 
 namespace {
 
-bool IsAligned(const void* ptr, int alignment) {
+bool IsAligned(const void* ptr, size_t alignment) {
   return reinterpret_cast<uintptr_t>(ptr) % alignment == 0;
 }