Removed IllegalAccessException and UnsupportedOperationException.

lib/compiler/implementation/elements/elements.dart

 // 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.
 
 library elements;
 
 import 'dart:uri';
 
 // TODO(ahe): Rename prefix to 'api' when VM bug is fixed.
 import '../../compiler.dart' as api_e;
@@ skipping 213 matching lines @@
   Element get implementation => isPatched ? patch : this;
 
   /**
    * Returns the element which introduces the entity of this element.
    *
    * See [:patch_parser.dart:] for a description of the terminology.
    */
   Element get declaration => isPatch ? origin : this;
 
   Element get patch {
-    throw new UnsupportedOperationException('patch is not supported on $this');
+    throw new StateError('patch is not supported on $this');
   }
 
   Element get origin {
-    throw new UnsupportedOperationException('origin is not supported on $this');
+    throw new StateError('origin is not supported on $this');
   }
 
   // TODO(johnniwinther): This breaks for libraries (for which enclosing
   // elements are null) and is invalid for top level variable declarations for
   // which the enclosing element is a VariableDeclarations and not a compilation
   // unit.
   bool isTopLevel() {
     return enclosingElement != null && enclosingElement.isCompilationUnit();
   }
 
@@ skipping 1686 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }