VM: Make more globals constant where easily possible.

runtime/vm/runtime_entry.h

 // Copyright (c) 2011, 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_RUNTIME_ENTRY_H_
 #define VM_RUNTIME_ENTRY_H_
 
 #include "vm/allocation.h"
 #include "vm/flags.h"
 #include "vm/native_arguments.h"
@@ skipping 27 matching lines @@
 class RuntimeEntry : public ValueObject {
  public:
   RuntimeEntry(const char* name, RuntimeFunction function,
                intptr_t argument_count, bool is_leaf, bool is_float)
       : name_(name),
         function_(function),
         argument_count_(argument_count),
         is_leaf_(is_leaf),
         is_float_(is_float),
         next_(NULL) {
-    // Strip off const for registration.
-    VMTag::RegisterRuntimeEntry(const_cast<RuntimeEntry*>(this));
+    VMTag::RegisterRuntimeEntry(this);
   }
   ~RuntimeEntry() {}
 
   const char* name() const { return name_; }
   RuntimeFunction function() const { return function_; }
   intptr_t argument_count() const { return argument_count_; }
   bool is_leaf() const { return is_leaf_; }
   bool is_float() const { return is_float_; }
   uword GetEntryPoint() const;
 
@@ skipping 111 matching lines @@
 #define CHECK_LEAF_RUNTIME_ADDRESS(type, name, ...)                            \
   if (address == k##name##RuntimeEntry.GetEntryPoint()) return k##name##Id;
   LEAF_RUNTIME_ENTRY_LIST(CHECK_LEAF_RUNTIME_ADDRESS)
 #undef CHECK_LEAF_RUNTIME_ADDRESS
   return kNoRuntimeFunctionId;
 }
 
 }  // namespace dart
 
 #endif  // VM_RUNTIME_ENTRY_H_