Implement import scope

runtime/vm/class_finalizer.cc

 // 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.
 
 #include "vm/class_finalizer.h"
 
 #include "vm/flags.h"
 #include "vm/heap.h"
 #include "vm/isolate.h"
 #include "vm/longjump.h"
@@ skipping 65 matching lines @@
       for (intptr_t i = 0; i < class_array.Length(); i++) {
         cls ^= class_array.At(i);
         if (!cls.is_interface()) {
           VerifyClassImplements(cls);
         }
       }
     }
     // Clear pending classes array.
     class_array = GrowableObjectArray::New();
     object_store->set_pending_classes(class_array);
-
-    // Check to ensure there are no duplicate definitions in the library
-    // hierarchy.
-    const String& str = String::Handle(Library::CheckForDuplicateDefinition());
-    if (!str.IsNull()) {
-      ReportError("Duplicate definition : %s\n", str.ToCString());
-    }
   } else {
     retval = false;
   }
   isolate->set_long_jump_base(base);
   return retval;
 }
 
 
 // Adds all interfaces of cls into 'collected'. Duplicate entries may occur.
 // No cycles are allowed.
@@ skipping 1404 matching lines @@
 void ClassFinalizer::ReportError(const char* format, ...) {
   va_list args;
   va_start(args, format);
   const Error& error = Error::Handle(
       Parser::FormatError(Script::Handle(), -1, "Error", format, args));
   va_end(args);
   ReportError(error);
 }
 
 }  // namespace dart