Style guide says enum values should be lowerCamelCase.

https://www.dartlang.org/articles/style-guide/#names

R=jackson@google.com

Review URL: https://codereview.chromium.org/1158813004

examples/raw/interactive_flex.dart

@@ -53,7 +53,7 @@ void main() {
     child.parentData.flex = flex;
   }
 
-  var row = new RenderFlex(direction: FlexDirection.Horizontal);
+  var row = new RenderFlex(direction: FlexDirection.horizontal);
 
   // Left cell
   addFlexChildSolidColor(row, const Color(0xFF00D2B8), flex: 1);
@@ -64,7 +64,7 @@ void main() {
   var padding = new RenderPadding(padding: const EdgeDims.all(10.0), child: image);
   row.add(padding);
 
-  RenderFlex column = new RenderFlex(direction: FlexDirection.Vertical);
+  RenderFlex column = new RenderFlex(direction: FlexDirection.vertical);
 
   // Top cell
   addFlexChildSolidColor(column, const Color(0xFF55DDCA), flex: 1);

examples/raw/render_paragraph.dart

@@ -13,7 +13,7 @@ import '../lib/solid_color_box.dart';
 AppView app;
 
 void main() {
-  RenderFlex flexRoot = new RenderFlex(direction: FlexDirection.Vertical);
+  RenderFlex flexRoot = new RenderFlex(direction: FlexDirection.vertical);
 
   RenderObject root = new RenderDecoratedBox(
     decoration: new BoxDecoration(backgroundColor: const Color(0xFF606060)),

examples/stocks2/lib/stock_app.dart

@@ -26,7 +26,7 @@ import 'package:sky/framework/rendering/box.dart';
 import 'dart:async';
 import 'dart:sky' as sky;
 
-enum StockMode { Optimistic, Pessimistic }
+enum StockMode { optimistic, pessimistic }
 
 class StocksApp extends App {
 
@@ -106,7 +106,7 @@ class StocksApp extends App {
     });
   }
 
-  StockMode _stockMode = StockMode.Optimistic;
+  StockMode _stockMode = StockMode.optimistic;
   void _handleStockModeChange(StockMode value) {
     setState(() {
       _stockMode = value;
@@ -133,18 +133,18 @@ class StocksApp extends App {
         // new MenuItem(
         //   key: 'Optimistic Menu Item',
         //   icon: 'action/thumb_up',
-        //   onGestureTap: (event) => _handleStockModeChange(StockMode.Optimistic),
+        //   onGestureTap: (event) => _handleStockModeChange(StockMode.optimistic),
         //   children: [
         //     new ParentDataNode(new Text('Optimistic'), _flex1),
-        //     new Radio(key: 'optimistic-radio', value: StockMode.Optimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
+        //     new Radio(key: 'optimistic-radio', value: StockMode.optimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
         //   ]),
         // new MenuItem(
         //   key: 'Pessimistic Menu Item',
         //   icon: 'action/thumb_down',
-        //   onGestureTap: (event) => _handleStockModeChange(StockMode.Pessimistic),
+        //   onGestureTap: (event) => _handleStockModeChange(StockMode.pessimistic),
         //   children: [
         //     new ParentDataNode(new Text('Pessimistic'), _flex1),
-        //     new Radio(key: 'pessimistic-radio', value: StockMode.Pessimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
+        //     new Radio(key: 'pessimistic-radio', value: StockMode.pessimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
         //   ]),
         // new MenuDivider(key: 'div2'),
         new MenuItem(

examples/stocks2/lib/stock_arrow.dart

@@ -79,7 +79,7 @@ class StockArrow extends Component {
 
     return new FlexContainer(
       inlineStyle: 'border-color: $border',
-      direction: FlexDirection.Row,
+      direction: FlexDirection.horizontal,
       style: _style,
       children: [
         new Container(