Eliminate the old non blink code paths from idl generation

tools/dom/templates/html/dartium/html_dartium.darttemplate

 // 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.
 
 // DO NOT EDIT
 // Auto-generated dart:html library.
 
 /**
  * HTML elements and other resources for web-based applications that need to
  * interact with the browser and the DOM (Document Object Model).
@@ skipping 38 matching lines @@
 import 'dart:web_gl' as gl;
 import 'dart:web_gl' show web_glBlinkMap;
 import 'dart:web_sql';
 // Not actually used, but imported since dart:html can generate these objects.
 import 'dart:svg' as svg;
 import 'dart:svg' show svgBlinkMap;
 import 'dart:svg' show Matrix;
 import 'dart:svg' show SvgSvgElement;
 import 'dart:web_audio' as web_audio;
 import 'dart:web_audio' show web_audioBlinkMap;
-$if DART_USE_BLINK
 import 'dart:_blink' as _blink;
-$endif
 
 export 'dart:math' show Rectangle, Point;
 
 $!GENERATED_DART_FILES
 
 // Issue 14721, order important for WrappedEvent.
 part '$AUXILIARY_DIR/AttributeMap.dart';
 part '$AUXILIARY_DIR/CanvasImageSource.dart';
 part '$AUXILIARY_DIR/CrossFrameTypes.dart';
 part '$AUXILIARY_DIR/CssClassSet.dart';
@@ skipping 12 matching lines @@
 part '$AUXILIARY_DIR/Validators.dart';
 part '$AUXILIARY_DIR/WrappedList.dart';
 part '$AUXILIARY_DIR/_HttpRequestUtils.dart';
 part '$AUXILIARY_DIR/_ListIterators.dart';
 part '$AUXILIARY_DIR/dartium_CustomElementSupport.dart';
 part '$AUXILIARY_DIR/dartium_KeyEvent.dart';
 part '$AUXILIARY_DIR/dartium_Platform.dart';
 part '$AUXILIARY_DIR/dartium_WrappedEvent.dart';
 part '$AUXILIARY_DIR/shared_html.dart';
 
-$if DART_USE_BLINK
 part '$AUXILIARY_DIR/html_native_DOMImplementation.dart';
-$else
-part '$AUXILIARY_DIR/native_DOMImplementation.dart';
-$endif
 
 Window _window;
 
 /**
  * Top-level container for a web page, which is usually a browser tab or window.
  *
  * Each web page loaded in the browser has its own [Window], which is a
  * container for the web page.
  *
  * If the web page has any `<iframe>` elements, then each `<iframe>` has its own
@@ skipping 28 matching lines @@
  * Spawn a DOM isolate using the given URI in the same window.
  * This isolate is not concurrent.  It runs on the browser thread
  * with full access to the DOM.
  * Note: this API is still evolving and may move to dart:isolate.
  */
 @Experimental()
 Future<Isolate> spawnDomUri(Uri uri, List<String> args, message) {
   // TODO(17738): Plumb arguments and return value through.
   return _Utils.spawnDomUri(uri.toString());
 }
-$if DART_USE_BLINK
 // FIXME: Can we make this private?
 final htmlBlinkMap = {
   '_HistoryCrossFrame': () => _HistoryCrossFrame,
   '_LocationCrossFrame': () => _LocationCrossFrame,
   '_DOMWindowCrossFrame': () => _DOMWindowCrossFrame,
   // FIXME: Move these to better locations.
   'DateTime': () => DateTime,
   'JsObject': () => js.JsObject,
   'JsFunction': () => js.JsFunction,
   'JsArray': () => js.JsArray,
@@ skipping 83 matching lines @@
   }
   return null;
 }
 
 Type _getSvgType(String key) {
   if (svgBlinkMap.containsKey(key)) {
     return svgBlinkMap[key]();
   }
   return null;
 }
-
-$endif