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

runtime/vm/freelist.h

-// 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.
 
 #ifndef VM_FREELIST_H_
 #define VM_FREELIST_H_
 
+#include "platform/assert.h"
 #include "vm/allocation.h"
-#include "vm/assert.h"
 #include "vm/raw_object.h"
 
 namespace dart {
 
 // FreeListElement describes a freelist element that has the same size
 // as the smallest raw object. It uses the class_ field to point to a fake map
 // to enable basic traversing of the heap and to identify the type of freelist
 // element. It reuses the second word of the raw object to keep a next_
 // pointer to chain elements of the list together. For objects larger than the
 // minimal object size, the size of the element is embedded in the element at
@@ skipping 78 matching lines @@
   void SplitElementAfterAndEnqueue(FreeListElement* element, intptr_t size);
 
   FreeListElement* free_lists_[kNumLists + 1];
 
   DISALLOW_COPY_AND_ASSIGN(FreeList);
 };
 
 }  // namespace dart
 
 #endif  // VM_FREELIST_H_