Read platform.dill in the VM.

runtime/vm/kernel_reader.h

 // 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.
 
 #ifndef RUNTIME_VM_KERNEL_READER_H_
 #define RUNTIME_VM_KERNEL_READER_H_
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 #include <map>
 
@@ skipping 35 matching lines @@
 
  private:
   typedef MallocMap<KernelType, VmType*> MapType;
   MapType map_;
 };
 
 class KernelReader {
  public:
   explicit KernelReader(Program* program);
 
-  // Returns either a library or a failure object.
+  // Returns the library containing the main procedure, null if there
+  // was no main procedure, or a failure object if there was an error.
   dart::Object& ReadProgram();
 
   static void SetupFunctionParameters(TranslationHelper translation_helper_,
                                       DartTypeTranslator type_translator_,
                                       const dart::Class& owner,
                                       const dart::Function& function,
                                       FunctionNode* kernel_function,
                                       bool is_method,
                                       bool is_closure);
 
@@ skipping 53 matching lines @@
 
   GrowableArray<const dart::Function*> functions_;
   GrowableArray<const dart::Field*> fields_;
 };
 
 }  // namespace kernel
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 #endif  // RUNTIME_VM_KERNEL_READER_H_