Revert 21502 - "Move OS::MemCopy and OS::MemMove out of platform to utils"

src/jsregexp.cc

Index: src/jsregexp.cc
diff --git a/src/jsregexp.cc b/src/jsregexp.cc
index 01140e830a35726f657956947e3c65beeca1de39..ae338d0c0ed30b62395edff54304bae6bdb1a028 100644
--- a/src/jsregexp.cc
+++ b/src/jsregexp.cc
@@ -604,7 +604,8 @@ int RegExpImpl::IrregexpExecRaw(Handle<JSRegExp> regexp,
                                                      index);
   if (result == RE_SUCCESS) {
     // Copy capture results to the start of the registers array.
-    MemCopy(output, raw_output, number_of_capture_registers * sizeof(int32_t));
+    OS::MemCopy(
+        output, raw_output, number_of_capture_registers * sizeof(int32_t));
   }
   if (result == RE_EXCEPTION) {
     ASSERT(!isolate->has_pending_exception());