Make patch file import declarations apply to the patched library too.

lib/compiler/implementation/lib/web.dart

Index: lib/compiler/implementation/lib/web.dart
diff --git a/lib/compiler/implementation/lib/web.dart b/lib/compiler/implementation/lib/web.dart
deleted file mode 100644
index a75db7bf6a9d46bbfc28b7358078c7090d6aff65..0000000000000000000000000000000000000000
--- a/lib/compiler/implementation/lib/web.dart
+++ /dev/null
@@ -1,9 +0,0 @@
-// 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("web");
-
-String htmlEscape(String text) {
-  throw "Unimplemented: web::htmlEscape(String).";
-}