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

src/log.cc

 // Copyright 2011 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 389 matching lines @@
         if (utf8_pos_ + char_length > kUtf8BufferSize) break;
         unibrow::Utf8::Encode(utf8_buffer_ + utf8_pos_, c, previous);
         utf8_pos_ += char_length;
       }
       previous = c;
     }
   }
 
   void AppendBytes(const char* bytes, int size) {
     size = Min(size, kUtf8BufferSize - utf8_pos_);
-    memcpy(utf8_buffer_ + utf8_pos_, bytes, size);
+    OS::MemCopy(utf8_buffer_ + utf8_pos_, bytes, size);
     utf8_pos_ += size;
   }
 
   void AppendBytes(const char* bytes) {
     AppendBytes(bytes, StrLength(bytes));
   }
 
   void AppendByte(char c) {
     if (utf8_pos_ >= kUtf8BufferSize) return;
     utf8_buffer_[utf8_pos_++] = c;
@@ skipping 1583 matching lines @@
 void SamplerRegistry::RemoveActiveSampler(Sampler* sampler) {
   ASSERT(sampler->IsActive());
   ScopedLock lock(active_samplers_mutex);
   ASSERT(active_samplers_ != NULL);
   bool removed = active_samplers_->RemoveElement(sampler);
   ASSERT(removed);
   USE(removed);
 }
 
 } }  // namespace v8::internal