Allow the VM to read Kernel files with external libraries

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 76 matching lines @@
   }
 
   NameIndex library_canonical_name(intptr_t index) {
     kernel::Reader reader(program_->kernel_data(),
                           program_->kernel_data_size());
     reader.set_offset(reader.size() - 4 -
                       (program_->library_count() - index) * 4);
     reader.set_offset(reader.ReadUInt32());
 
     // Start reading library.
-    reader.ReadFlags();  // read flags.
+    reader.ReadFlags();
     return reader.ReadCanonicalNameReference();
   }
 
   uint8_t CharacterAt(StringIndex string_index, intptr_t index);
 
   static bool FieldHasFunctionLiteralInitializer(const Field& field,
                                                  TokenPosition* start,
                                                  TokenPosition* end);
 
  private:
@@ skipping 47 matching lines @@
 
   GrowableArray<const Function*> functions_;
   GrowableArray<const Field*> fields_;
 };
 
 }  // namespace kernel
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 #endif  // RUNTIME_VM_KERNEL_READER_H_