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

src/execution.cc

Index: src/execution.cc
diff --git a/src/execution.cc b/src/execution.cc
index 4c6bd93d0626d8ade188292a5f4532658a39d0f0..fc5198069d6f167a7623ab09779fa3d7161913b9 100644
--- a/src/execution.cc
+++ b/src/execution.cc
@@ -380,7 +380,7 @@ bool StackGuard::CheckAndClearInterrupt(InterruptFlag flag,
 
 char* StackGuard::ArchiveStackGuard(char* to) {
   ExecutionAccess access(isolate_);
-  MemCopy(to, reinterpret_cast<char*>(&thread_local_), sizeof(ThreadLocal));
+  OS::MemCopy(to, reinterpret_cast<char*>(&thread_local_), sizeof(ThreadLocal));
   ThreadLocal blank;
 
   // Set the stack limits using the old thread_local_.
@@ -397,7 +397,8 @@ char* StackGuard::ArchiveStackGuard(char* to) {
 
 char* StackGuard::RestoreStackGuard(char* from) {
   ExecutionAccess access(isolate_);
-  MemCopy(reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal));
+  OS::MemCopy(
+      reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal));
   isolate_->heap()->SetStackLimits();
   return from + sizeof(ThreadLocal);
 }