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

test/cctest/test-heap-profiler.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 553 matching lines @@
   TestJSONStream() : eos_signaled_(0), abort_countdown_(-1) {}
   explicit TestJSONStream(int abort_countdown)
       : eos_signaled_(0), abort_countdown_(abort_countdown) {}
   virtual ~TestJSONStream() {}
   virtual void EndOfStream() { ++eos_signaled_; }
   virtual WriteResult WriteAsciiChunk(char* buffer, int chars_written) {
     if (abort_countdown_ > 0) --abort_countdown_;
     if (abort_countdown_ == 0) return kAbort;
     CHECK_GT(chars_written, 0);
     i::Vector<char> chunk = buffer_.AddBlock(chars_written, '\0');
-    memcpy(chunk.start(), buffer, chars_written);
+    i::OS::MemCopy(chunk.start(), buffer, chars_written);
     return kContinue;
   }
   virtual WriteResult WriteUint32Chunk(uint32_t* buffer, int chars_written) {
     ASSERT(false);
     return kAbort;
   }
   void WriteTo(i::Vector<char> dest) { buffer_.WriteTo(dest); }
   int eos_signaled() { return eos_signaled_; }
   int size() { return buffer_.size(); }
 
@@ skipping 1180 matching lines @@
   // Check all the objects have got their names.
   // ... well check just every 8th because otherwise it's too slow in debug.
   for (int i = 0; i < num_objects - 1; i += 8) {
     i::EmbeddedVector<char, 100> var_name;
     i::OS::SNPrintF(var_name, "f_%d", i);
     const v8::HeapGraphNode* f_object = GetProperty(
         context_object, v8::HeapGraphEdge::kContextVariable, var_name.start());
     CHECK_NE(NULL, f_object);
   }
 }