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

src/string-stream.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 236 matching lines @@
 void StringStream::Add(const char* format, FmtElm arg0, FmtElm arg1,
                        FmtElm arg2, FmtElm arg3) {
   const char argc = 4;
   FmtElm argv[argc] = { arg0, arg1, arg2, arg3 };
   Add(CStrVector(format), Vector<FmtElm>(argv, argc));
 }
 
 
 SmartArrayPointer<const char> StringStream::ToCString() const {
   char* str = NewArray<char>(length_ + 1);
-  memcpy(str, buffer_, length_);
+  OS::MemCopy(str, buffer_, length_);
   str[length_] = '\0';
   return SmartArrayPointer<const char>(str);
 }
 
 
 void StringStream::Log() {
   LOG(ISOLATE, StringEvent("StackDump", buffer_));
 }
 
 
@@ skipping 300 matching lines @@
 char* HeapStringAllocator::grow(unsigned* bytes) {
   unsigned new_bytes = *bytes * 2;
   // Check for overflow.
   if (new_bytes <= *bytes) {
     return space_;
   }
   char* new_space = NewArray<char>(new_bytes);
   if (new_space == NULL) {
     return space_;
   }
-  memcpy(new_space, space_, *bytes);
+  OS::MemCopy(new_space, space_, *bytes);
   *bytes = new_bytes;
   DeleteArray(space_);
   space_ = new_space;
   return new_space;
 }
 
 
 // Only grow once to the maximum allowable size.
 char* NoAllocationStringAllocator::grow(unsigned* bytes) {
   ASSERT(size_ >= *bytes);
   *bytes = size_;
   return space_;
 }
 
 
 } }  // namespace v8::internal