Add support for converted closures with explicit contexts to VM

runtime/vm/kernel_to_il.cc

 // Copyright (c) 2016, 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 <set>
 
 #include "vm/kernel_to_il.h"
 
 #include "vm/compiler.h"
 #include "vm/intermediate_language.h"
@@ skipping 826 matching lines @@
         instructions += LoadFunctionTypeArguments();
       } else {
         instructions += NullConstant();
       }
       instructions += InstantiateTypeArguments(type_arguments);
     }
   }
   return instructions;
 }
 
-Fragment FlowGraphBuilder::AllocateContext(int size) {
+Fragment FlowGraphBuilder::AllocateContext(intptr_t size) {
   AllocateContextInstr* allocate =
       new (Z) AllocateContextInstr(TokenPosition::kNoSource, size);
   Push(allocate);
   return Fragment(allocate);
 }
 
 Fragment FlowGraphBuilder::AllocateObject(TokenPosition position,
                                           const dart::Class& klass,
                                           intptr_t argument_count) {
   ArgumentArray arguments = GetArguments(argument_count);
@@ skipping 1497 matching lines @@
   StreamingFlowGraphBuilder streaming_flow_graph_builder(
       &helper, zone_, script.kernel_data(), script.kernel_data_size());
   return streaming_flow_graph_builder.GetLineStartsFor(
       script.kernel_script_index());
 }
 
 }  // namespace kernel
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)