Add optional message argument to assert statements in the VM.

runtime/vm/parser.h

 // 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_PARSER_H_
 #define VM_PARSER_H_
 
 #include "include/dart_api.h"
 
 #include "platform/assert.h"
@@ skipping 764 matching lines @@
 
   static SequenceNode* NodeAsSequenceNode(intptr_t sequence_pos,
                                           AstNode* node,
                                           LocalScope* scope);
 
   SequenceNode* MakeImplicitConstructor(const Function& func);
   AstNode* MakeStaticCall(const String& cls_name,
                           const String& func_name,
                           ArgumentListNode* arguments);
   String& Interpolate(const GrowableArray<AstNode*>& values);
-  AstNode* MakeAssertCall(intptr_t begin, intptr_t end);
+  AstNode* MakeAssertCall(intptr_t begin, intptr_t end, AstNode* message);
   AstNode* ThrowTypeError(intptr_t type_pos, const AbstractType& type,
                            LibraryPrefix* prefix = NULL);
   AstNode* ThrowNoSuchMethodError(intptr_t call_pos,
                                   const Class& cls,
                                   const String& function_name,
                                   ArgumentListNode* function_arguments,
                                   InvocationMirror::Call call,
                                   InvocationMirror::Type type,
                                   const Function* func,
                                   const LibraryPrefix* prefix = NULL);
@@ skipping 92 matching lines @@
 
   // Indentation of parser trace.
   intptr_t trace_indent_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_