Remove "RenderBlock" class from examples that use it without giving it unrestricted height.

sky/sdk/example/rendering/flex.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;
+
+import 'package:sky/rendering/box.dart';
+import 'package:sky/rendering/flex.dart';
+import 'package:sky/rendering/sky_binding.dart';
+
+class RenderSolidColor extends RenderDecoratedBox {
+  final sky.Size desiredSize;
+  final sky.Color backgroundColor;
+
+  RenderSolidColor(sky.Color backgroundColor, { this.desiredSize: sky.Size.infinite })
+      : backgroundColor = backgroundColor,
+        super(decoration: new BoxDecoration(backgroundColor: backgroundColor)) {
+  }
+
+  double getMinIntrinsicWidth(BoxConstraints constraints) {
+    return constraints.constrainWidth(desiredSize.width);
+  }
+
+  double getMaxIntrinsicWidth(BoxConstraints constraints) {
+    return constraints.constrainWidth(desiredSize.width);
+  }
+
+  double getMinIntrinsicHeight(BoxConstraints constraints) {
+    return constraints.constrainHeight(desiredSize.height);
+  }
+
+  double getMaxIntrinsicHeight(BoxConstraints constraints) {
+    return constraints.constrainHeight(desiredSize.height);
+  }
+
+  void performLayout() {
+    size = constraints.constrain(desiredSize);
+  }
+
+  void handleEvent(sky.Event event, BoxHitTestEntry entry) {
+    if (event.type == 'pointerdown')
+      decoration = new BoxDecoration(backgroundColor: const sky.Color(0xFFFF0000));
+    else if (event.type == 'pointerup')
+      decoration = new BoxDecoration(backgroundColor: backgroundColor);
+  }
+}
+
+RenderBox buildFlexExample() {
+  RenderFlex flexRoot = new RenderFlex(direction: FlexDirection.vertical);
+
+  RenderDecoratedBox root = new RenderDecoratedBox(
+    decoration: new BoxDecoration(backgroundColor: const sky.Color(0xFF000000)),
+    child: flexRoot
+  );
+
+  void addFlexChildSolidColor(RenderFlex parent, sky.Color backgroundColor, { int flex: 0 }) {
+    RenderSolidColor child = new RenderSolidColor(backgroundColor);
+    parent.add(child);
+    child.parentData.flex = flex;
+  }
+
+  // Yellow bar at top
+  addFlexChildSolidColor(flexRoot, const sky.Color(0xFFFFFF00), flex: 1);
+
+  // Turquoise box
+  flexRoot.add(new RenderSolidColor(const sky.Color(0x7700FFFF), desiredSize: new sky.Size(100.0, 100.0)));
+
+  var renderDecoratedBlock = new RenderDecoratedBox(
+    decoration: new BoxDecoration(backgroundColor: const sky.Color(0xFFFFFFFF))
+  );
+
+  flexRoot.add(new RenderPadding(padding: const EdgeDims.all(10.0), child: renderDecoratedBlock));
+
+  var row = new RenderFlex(direction: FlexDirection.horizontal);
+
+  // Purple and blue cells
+  addFlexChildSolidColor(row, const sky.Color(0x77FF00FF), flex: 1);
+  addFlexChildSolidColor(row, const sky.Color(0xFF0000FF), flex: 2);
+
+  var decoratedRow = new RenderDecoratedBox(
+    decoration: new BoxDecoration(backgroundColor: const sky.Color(0xFF333333)),
+    child: row
+  );
+
+  flexRoot.add(decoratedRow);
+  decoratedRow.parentData.flex = 3;
+
+  return root;
+}
+
+void main() {
+  new SkyBinding(root: buildFlexExample());
+}