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

test/cctest/test-compiler.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 312 matching lines @@
   const char function_f[] = "function f() {}";
   const int max_rows = 1000;
   const int buffer_size = max_rows + sizeof(function_f);
   ScopedVector<char> buffer(buffer_size);
   memset(buffer.start(), '\n', buffer_size - 1);
   buffer[buffer_size - 1] = '\0';
 
   for (int i = 0; i < max_rows; ++i) {
     if (i > 0)
       buffer[i - 1] = '\n';
-    memcpy(&buffer[i], function_f, sizeof(function_f) - 1);
+    OS::MemCopy(&buffer[i], function_f, sizeof(function_f) - 1);
     v8::Handle<v8::String> script_body = v8::String::New(buffer.start());
     v8::Script::Compile(script_body, &origin)->Run();
     v8::Local<v8::Function> f = v8::Local<v8::Function>::Cast(
         CcTest::env()->Global()->Get(v8::String::New("f")));
     CHECK_EQ(i, f->GetScriptLineNumber());
   }
 }
 
 
 // Test that optimized code for different closures is actually shared
@@ skipping 73 matching lines @@
   CompileRun("function f() { a = 12345678 }; f();");
   CheckCodeForUnsafeLiteral(GetJSFunction(CcTest::env()->Global(), "f"));
   CompileRun("function f(x) { a = 12345678 + x}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(CcTest::env()->Global(), "f"));
   CompileRun("function f(x) { var arguments = 1; x += 12345678}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(CcTest::env()->Global(), "f"));
   CompileRun("function f(x) { var arguments = 1; x = 12345678}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(CcTest::env()->Global(), "f"));
 }
 #endif