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

runtime/vm/stub_code.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 "vm/stub_code.h"
 
+#include "platform/assert.h"
 #include "vm/assembler.h"
-#include "vm/assert.h"
 #include "vm/disassembler.h"
 #include "vm/flags.h"
 #include "vm/virtual_memory.h"
 #include "vm/visitor.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, disassemble_stubs, false, "Disassemble generated stubs.");
 
 #define STUB_CODE_DECLARE(name)                                                \
@@ skipping 153 matching lines @@
   VM_STUB_CODE_LIST(STUB_CODE_TESTER);
   Isolate* isolate = Isolate::Current();
   if ((isolate != NULL) && (isolate->stub_code() != NULL)) {
     STUB_CODE_LIST(STUB_CODE_TESTER);
   }
 #undef STUB_CODE_TESTER
   return NULL;
 }
 
 }  // namespace dart