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

src/x87/codegen-x87.cc

Index: src/x87/codegen-x87.cc
diff --git a/src/x87/codegen-x87.cc b/src/x87/codegen-x87.cc
index 711aff276534565c786dc19cd120f20a0a3af18b..01e346f145bf5d5914d1b54d80902b6cc14674c4 100644
--- a/src/x87/codegen-x87.cc
+++ b/src/x87/codegen-x87.cc
@@ -76,7 +76,7 @@ class LabelConverter {
 };
 
 
-MemMoveFunction CreateMemMoveFunction() {
+OS::MemMoveFunction CreateMemMoveFunction() {
   size_t actual_size;
   // Allocate buffer in executable space.
   byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
@@ -185,7 +185,7 @@ MemMoveFunction CreateMemMoveFunction() {
   OS::ProtectCode(buffer, actual_size);
   // TODO(jkummerow): It would be nice to register this code creation event
   // with the PROFILE / GDBJIT system.
-  return FUNCTION_CAST<MemMoveFunction>(buffer);
+  return FUNCTION_CAST<OS::MemMoveFunction>(buffer);
 }