Tabs and Scrolling demo is confused about its scroll position
flutter/flutter version a8369413e47c41ffcb7c1884cf9dfe40af027fa3
[✓] Flutter (on Mac OS, channel master)
• Flutter at /src/flutter
• Framework revision cc201f0b1a (12 days ago), 2016-08-05 09:06:32
• Engine revision 44a77da98a
• Tools Dart version 1.19.0-dev.5.0
[✓] Android toolchain - develop for Android devices (Android SDK 23.0.2)
• Android SDK at /Users/eseidel/Library/Android/sdk
• Platform android-23, build-tools 23.0.2
• Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
[✓] iOS toolchain - develop for iOS devices (Xcode 7.3.1)
• XCode at /Applications/Xcode.app/Contents/Developer
• Xcode 7.3.1, Build version 7D1014
[✓] Atom - a lightweight development environment for Flutter
• flutter plugin version 0.2.4
• dartlang plugin version 0.6.35
