Require two type arguments for map literals (issue 4522).

lib/compiler/implementation/compiler.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.
 
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
 final bool REPORT_EXCESS_RESOLUTION = false;
@@ skipping 373 matching lines @@
       addForeignFunctions(library);  // Is safe even if already added.
       applyLibraryPatch(library, patchLibrary);
     }
   }
 
   void applyLibraryPatch(LibraryElement original, LibraryElement patch) {
     Link<Element> patches = patch.localMembers;
     applyContainerPatch(original, patches);
 
     // Copy imports from patch to original library.
-    Map<String, LibraryElement> delayedPatches = <LibraryElement>{};
+    Map<String, LibraryElement> delayedPatches = <String, LibraryElement>{};
     Uri patchBase = patch.uri;
     for (ScriptTag tag in patch.tags.reverse()) {
       if (tag.isImport()) {
         StringNode argument = tag.argument;
         Uri resolved = patchBase.resolve(argument.dartString.slowToString());
         LibraryElement importedLibrary =
             scanner.loadLibrary(resolved, argument);
         scanner.importLibrary(original, importedLibrary, tag,
                               patch.entryCompilationUnit);
         if (resolved.scheme == "dart") {
@@ skipping 550 matching lines @@
     final endOffset = end.charOffset + end.slowCharCount;
 
     // [begin] and [end] might be the same for the same empty token. This
     // happens for instance when scanning '$$'.
     assert(endOffset >= beginOffset);
     return f(beginOffset, endOffset);
   }
 
   String toString() => 'SourceSpan($uri, $begin, $end)';
 }