Move sky/examples to sky/sdk/lib/example, and code changes to support that change. Fixes T277.

sky/examples/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
-  canvas.translate(0.0, 100.0);
-
-  // set up the text
-  sky.Document document = new sky.Document();
-  sky.Text arabic = document.createText("مرحبا");
-  sky.Text english = document.createText(" Hello");
-  sky.Element block = document.createElement('div');
-  block.style['display'] = 'paragraph';
-  block.style['font-family'] = 'monospace';
-  block.style['font-size'] = '50px';
-  block.style['line-height'] = lh;
-  block.style['color'] = '#0000A0';
-  block.appendChild(arabic);
-  block.appendChild(english);
-  sky.LayoutRoot layoutRoot = new sky.LayoutRoot();
-  layoutRoot.rootElement = block;
-  layoutRoot.maxWidth = sky.view.width - 20.0; // you need to set a width for this to paint
-  layoutRoot.layout();
-
-  // draw a line at the text's baseline
-  sky.Path path = new sky.Path();
-  path.moveTo(0.0, 0.0);
-  path.lineTo(block.maxContentWidth, 0.0);
-  path.moveTo(0.0, block.alphabeticBaseline);
-  path.lineTo(block.maxContentWidth, block.alphabeticBaseline);
-  path.moveTo(0.0, block.height);
-  path.lineTo(block.maxContentWidth, block.height);
-  paint.color = const sky.Color(0xFFFF9000);
-  paint.setStyle(sky.PaintingStyle.stroke);
-  paint.strokeWidth = 3.0;
-  canvas.drawPath(path, paint);  
-
-  // paint the text
-  layoutRoot.paint(canvas);
-}
-
-void main() {
-  // prepare the rendering
-  sky.PictureRecorder recorder = new sky.PictureRecorder();
-  sky.Canvas canvas = new sky.Canvas(recorder, sky.view.width, sky.view.height);
-
-  // background
-  sky.Paint paint = new sky.Paint();
-  paint.color = const sky.Color(0xFFFFFFFF);
-  paint.setStyle(sky.PaintingStyle.fill);
-  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();
-}