Update type annotation.

dart/lib/compiler/implementation/apiimpl.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('leg_apiimpl');
 
 #import('dart:uri');
 
 #import('../compiler.dart', prefix: 'api');
 #import('leg.dart', prefix: 'leg');
 #import('tree/tree.dart', prefix: 'tree');
 #import('elements/elements.dart', prefix: 'elements');
 #import('ssa/tracer.dart', prefix: 'ssa');
 #import('library_map.dart');
 #import('source_file.dart');
 
 class Compiler extends leg.Compiler {
-  api.ReadUriFromString provider;
+  api.ReadStringFromUri provider;
   api.DiagnosticHandler handler;
   final Uri libraryRoot;
   final Uri packageRoot;
   List<String> options;
   bool mockableLibraryUsed = false;
 
   Compiler(this.provider, this.handler, this.libraryRoot, this.packageRoot,
            List<String> options)
     : this.options = options,
       super(
@@ skipping 73 matching lines @@
       handler(translateUri(span.uri, null), span.begin, span.end,
               message, fatal);
     }
   }
 
   bool get isMockCompilation() {
     return mockableLibraryUsed
       && (options.indexOf('--allow-mock-compilation') !== -1);
   }
 }