Fix CopyBytes to accept size_t for num_bytes

src/v8utils.h

 // 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 133 matching lines @@
     do {
       remaining--;
       *dst++ = *src++;
     } while (remaining > 0);
   }
 }
 
 
 // Copies data from |src| to |dst|.  The data spans must not overlap.
 template <typename T>
-inline void CopyBytes(T* dst, T* src, int num_bytes) {
+inline void CopyBytes(T* dst, T* src, size_t num_bytes) {
   STATIC_ASSERT(sizeof(T) == 1);
   ASSERT(Min(dst, src) + num_bytes <= Max(dst, src));
-  ASSERT(num_bytes >= 0);
   if (num_bytes == 0) return;
 
   // Use block copying OS::MemCopy if the segment we're copying is
   // enough to justify the extra call/setup overhead.
   static const int kBlockCopyLimit = OS::kMinComplexMemCopy;
 
-  if (num_bytes >= kBlockCopyLimit) {
+  if (num_bytes >= static_cast<size_t>(kBlockCopyLimit)) {
     OS::MemCopy(dst, src, num_bytes);
   } else {
-    int remaining = num_bytes;
+    size_t remaining = num_bytes;
     do {
       remaining--;
       *dst++ = *src++;
     } while (remaining > 0);
   }
 }
 
 
 template <typename T, typename U>
 inline void MemsetPointer(T** dest, U* value, int counter) {
@@ skipping 124 matching lines @@
 
   // Add formatted contents like printf based on a va_list.
   void AddFormattedList(const char* format, va_list list);
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8UTILS_H_