test renaming overhaul: step 4 client tests

tests/dom/canvas_using_html_test.dart

 #library('CanvasUsingHtmlTest');
-#import('../../../../lib/unittest/unittest.dart');
-#import('../../../../lib/unittest/dom_config.dart');
+#import('../../lib/unittest/unittest.dart');
+#import('../../lib/unittest/dom_config.dart');
 #import('dart:html', prefix: 'html');
 #import('dart:dom');
 
 // Version of Canvas test that implicitly uses dart:html library via unittests.
 
 main() {
   HTMLCanvasElement canvas;
   CanvasRenderingContext2D context;
 
   canvas = document.createElement('canvas');
@@ skipping 34 matching lines @@
     ImageData image = context.createImageData(canvas.width,
                                               canvas.height);
     Uint8ClampedArray bytes = image.data;
 
     // FIXME: uncomment when numeric index getters are supported.
     //var byte = bytes[0];
 
     Expect.equals(40000, bytes.length);
   });
 }