Getting html_dart2js and html_dartium a bit more in sync.

tools/dom/templates/html/impl/impl_CanvasRenderingContext2D.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.
 
 part of $LIBRARYNAME;
 
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 $!MEMBERS
 
   /**
@@ skipping 94 matching lines @@
           sourceRect.top,
           sourceRect.width,
           sourceRect.height,
           destRect.left,
           destRect.top,
           destRect.width,
           destRect.height);
     }
 $else
     if (sourceRect == null) {
-      $dom_drawImage(source,
+      _drawImage(source,
           destRect.left,
           destRect.top,
           destRect.width,
           destRect.height);
     } else {
-      $dom_drawImage(source,
+      _drawImage(source,
           sourceRect.left,
           sourceRect.top,
           sourceRect.width,
           sourceRect.height,
           destRect.left,
           destRect.top,
           destRect.width,
           destRect.height);
     }
 $endif
@@ skipping 27 matching lines @@
    * from [source].
    *   * [drawImage](http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-drawimage)
    * from the WHATWG.
    */
   @DomName('CanvasRenderingContext2D.drawImage')
 $if DART2JS
   @JSName('drawImage')
   void drawImage(CanvasImageSource source, num destX, num destY) native;
 $else
   void drawImage(CanvasImageSource source, num destX, num destY) {
-    $dom_drawImage(source, destX, destY);
+    _drawImage(source, destX, destY);
   }
 $endif
 
   /**
    * Draws an image from a CanvasImageSource to an area of this canvas.
    *
    * The image will be drawn to this context with its top left corner at the
    * point ([destX], [destY]) and will be scaled to be [destWidth] wide and
    * [destHeight] tall.
    *
@@ skipping 17 matching lines @@
    * from the WHATWG.
    */
   @DomName('CanvasRenderingContext2D.drawImage')
 $if DART2JS
   @JSName('drawImage')
   void drawImageScaled(CanvasImageSource source,
       num destX, num destY, num destWidth, num destHeight) native;
 $else
   void drawImageScaled(CanvasImageSource source,
       num destX, num destY, num destWidth, num destHeight) {
-    $dom_drawImage(source, destX, destY, destWidth, destHeight);
+    _drawImage(source, destX, destY, destWidth, destHeight);
   }
 $endif
 
   /**
    * Draws an image from a CanvasImageSource to an area of this canvas.
    *
    * The image is a region of [source] that is [sourceWidth] wide and
    * [destHeight] tall with top left corner at ([sourceX], [sourceY]).
    * The image will be drawn to this context with its top left corner at the
    * point ([destX], [destY]) and will be scaled to be [destWidth] wide and
@@ skipping 22 matching lines @@
   @DomName('CanvasRenderingContext2D.drawImage')
 $if DART2JS
   @JSName('drawImage')
   void drawImageScaledFromSource(CanvasImageSource source,
       num sourceX, num sourceY, num sourceWidth, num sourceHeight,
       num destX, num destY, num destWidth, num destHeight) native;
 $else
   void drawImageScaledFromSource(CanvasImageSource source,
       num sourceX, num sourceY, num sourceWidth, num sourceHeight,
       num destX, num destY, num destWidth, num destHeight) {
-    $dom_drawImage(source, sourceX, sourceY, sourceWidth, sourceHeight,
+    _drawImage(source, sourceX, sourceY, sourceWidth, sourceHeight,
         destX, destY, destWidth, destHeight);
   }
 $endif
 
 $if DART2JS
   @DomName('CanvasRenderingContext2D.lineDashOffset')
   num get lineDashOffset => JS('num',
       '#.lineDashOffset || #.webkitLineDashOffset', this, this);
 
   @DomName('CanvasRenderingContext2D.lineDashOffset')
-  void set lineDashOffset(num value) => JS('void', 
+  void set lineDashOffset(num value) => JS('void',
       'typeof #.lineDashOffset != "undefined" ? #.lineDashOffset = # : '
       '#.webkitLineDashOffset = #', this, this, value, this, value);
 $else
   // TODO(amouravski): Add Dartium native methods for drawImage once we figure
   // out how to not break native bindings.
 $endif
 }