Roll Observatory deps (charted -> ^0.3.0)

packages/dart_style/test/regression/0300/0398.stmt

Index: packages/dart_style/test/regression/0300/0398.stmt
diff --git a/packages/dart_style/test/regression/0300/0398.stmt b/packages/dart_style/test/regression/0300/0398.stmt
new file mode 100644
index 0000000000000000000000000000000000000000..7eed34a83fba708e912735dd34dbcfa5e5fac3af
--- /dev/null
+++ b/packages/dart_style/test/regression/0300/0398.stmt
@@ -0,0 +1,11 @@
+>>> (indent 4)
+    children.add(new DrawerHeader(children: [
+        new Flex([avatar, username],
+            justifyContent: FlexJustifyContent.center,
+            direction: FlexDirection.vertical)]));
+<<<
+    children.add(new DrawerHeader(children: [
+      new Flex([avatar, username],
+          justifyContent: FlexJustifyContent.center,
+          direction: FlexDirection.vertical)
+    ]));