Add TODOs about components needing to adjust to screen size changes.

sky/sdk/lib/framework/components2/drawer.dart

Index: sky/sdk/lib/framework/components2/drawer.dart
diff --git a/sky/sdk/lib/framework/components2/drawer.dart b/sky/sdk/lib/framework/components2/drawer.dart
index 7cffcf892dc583d48aa7dbcb182715c1e057566c..ca5d79f4a95c2bd19131523cbdcb10863a06231d 100644
--- a/sky/sdk/lib/framework/components2/drawer.dart
+++ b/sky/sdk/lib/framework/components2/drawer.dart
@@ -13,6 +13,19 @@ import 'dart:sky' as sky;
 import 'material.dart';
 import 'package:vector_math/vector_math.dart';
 
+// TODO(eseidel): Draw width should vary based on device size:
+// http://www.google.com/design/spec/layout/structure.html#structure-side-nav
+
+// Mobile:
+// Width = Screen width − 56 dp
+// Maximum width: 320dp
+// Maximum width applies only when using a left nav. When using a right nav,
+// the panel can cover the full width of the screen.
+
+// Desktop/Tablet:
+// Maximum width for a left nav is 400dp.
+// The right nav can vary depending on content.
+
 const double _kWidth = 304.0;
 const double _kMinFlingVelocity = 0.4;
 const double _kBaseSettleDurationMS = 246.0;