[dart2dart] Optionally cut types in variable declarations:

lib/compiler/implementation/apiimpl.dart

Index: lib/compiler/implementation/apiimpl.dart
diff --git a/lib/compiler/implementation/apiimpl.dart b/lib/compiler/implementation/apiimpl.dart
index 376a136b54a437dc62a203e841550d0b91305dec..0847766f976dddb4801ebc5a6e4f93779e4ae26c 100644
--- a/lib/compiler/implementation/apiimpl.dart
+++ b/lib/compiler/implementation/apiimpl.dart
@@ -30,7 +30,8 @@ class Compiler extends leg.Compiler {
           enableTypeAssertions: options.indexOf('--enable-checked-mode') != -1,
           enableUserAssertions: options.indexOf('--enable-checked-mode') != -1,
           emitJavascript: options.indexOf('--output-type=dart') == -1,
-          minify: options.indexOf('--minify') != -1);
+          minify: options.indexOf('--minify') != -1,
+          cutDeclarationTypes: options.indexOf('--cutDeclarationTypes') != -1);
 
   elements.LibraryElement scanBuiltinLibrary(String path) {
     Uri uri = libraryRoot.resolve(DART2JS_LIBRARY_MAP[path].libraryPath);