Move examples to //sky/sdk/example

sky/sdk/example/raw/baseline.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'dart:sky' as sky;
 
 void drawText(sky.Canvas canvas, String lh) {
   sky.Paint paint = new sky.Paint();
 
   // offset down
@@ skipping 45 matching lines @@
   canvas.drawRect(new sky.Rect.fromLTRB(0.0, 0.0, sky.view.width, sky.view.height), paint);
 
   canvas.translate(10.0, 0.0);
   drawText(canvas, '1.0');
   drawText(canvas, 'lh');
 
   // put it on the screen
   sky.view.picture = recorder.endRecording();
   sky.view.scheduleFrame();
 }