Move assert.h/assert.cc from runtime/vm to runtime/platform

runtime/lib/array.cc

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+#include "platform/assert.h"
 #include "vm/bootstrap_natives.h"
-
 #include "vm/assembler.h"
-#include "vm/assert.h"
 #include "vm/bigint_operations.h"
 #include "vm/exceptions.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 
 namespace dart {
 
 DEFINE_NATIVE_ENTRY(ObjectArray_allocate, 2) {
   const AbstractTypeArguments& type_arguments =
       AbstractTypeArguments::CheckedHandle(arguments->At(0));
@@ skipping 80 matching lines @@
     }
   } else {
     for (intptr_t i = 0; i < icount; i++) {
       src_obj = source.At(isrc_start + i);
       dest.SetAt(idst_start + i, src_obj);
     }
   }
 }
 
 }  // namespace dart