Verify that callers correctly set parentUsesSize if they use the child's size (and fix a few cases …

sky/sdk/lib/framework/rendering/object.dart

Index: sky/sdk/lib/framework/rendering/object.dart
diff --git a/sky/sdk/lib/framework/rendering/object.dart b/sky/sdk/lib/framework/rendering/object.dart
index 4f8173237604b63eea1b376d750bae5881314ec0..17682201ae4f9345f701f9442d96bc7176f127ff 100644
--- a/sky/sdk/lib/framework/rendering/object.dart
+++ b/sky/sdk/lib/framework/rendering/object.dart
@@ -128,11 +128,11 @@ abstract class RenderObject extends AbstractNode {
     _nodesNeedingLayout = new List<RenderObject>();
     dirtyNodes..sort((a, b) => a.depth - b.depth)..forEach((node) {
       if (node._needsLayout && node.attached)
-        node._doLayout();
+        node.layoutWithoutResize();
     });
     _debugDoingLayout = false;
   }
-  void _doLayout() {
+  void layoutWithoutResize() {
     try {
       assert(_relayoutSubtreeRoot == this);
       performLayout();