GN: aix port along with linux_s390x, linux_ppc64 and linux_ppc64le support.

base/trace_event/process_memory_dump.cc

Index: base/trace_event/process_memory_dump.cc
diff --git a/base/trace_event/process_memory_dump.cc b/base/trace_event/process_memory_dump.cc
index 63d1340e42e3222c3ee99e92a7e676279cffb8a1..9f710936e1405f2b4215761ab0d357d75b7dbd8d 100644
--- a/base/trace_event/process_memory_dump.cc
+++ b/base/trace_event/process_memory_dump.cc
@@ -121,7 +121,12 @@ size_t ProcessMemoryDump::CountResidentBytes(void* start_address,
     // HANDLE_EINTR tries for 100 times. So following the same pattern.
     do {
       result =
+#if defined(OS_AIX)
+          mincore(reinterpret_cast<char*>(chunk_start), chunk_size,
+                  reinterpret_cast<char*>(vec.get()));
+#else
           mincore(reinterpret_cast<void*>(chunk_start), chunk_size, vec.get());
+#endif
     } while (result == -1 && errno == EAGAIN && error_counter++ < 100);
     failure = !!result;