Replace OS::MemCopy with OS::MemMove (just as fast but more flexible).

src/v8utils.cc

Index: src/v8utils.cc
diff --git a/src/v8utils.cc b/src/v8utils.cc
index 58ad4e5edd5262b7dba1e67c769250e090ac3af1..c5ca846119c5d1e23dca23c67a0e3b0d5bdc3680 100644
--- a/src/v8utils.cc
+++ b/src/v8utils.cc
@@ -105,12 +105,12 @@ char* ReadLine(const char* prompt) {
       char* new_result = NewArray<char>(new_len);
       // Copy the existing input into the new array and set the new
       // array as the result.
-      memcpy(new_result, result, offset * kCharSize);
+      OS::MemCopy(new_result, result, offset * kCharSize);
       DeleteArray(result);
       result = new_result;
     }
     // Copy the newly read line into the result.
-    memcpy(result + offset, line_buf, len * kCharSize);
+    OS::MemCopy(result + offset, line_buf, len * kCharSize);
     offset += len;
   }
   ASSERT(result != NULL);