Move sky package into sky/packages/sky

This patch makes the sky package match the structure we've adopted for the
other Dart packages we produce from this repo.

packages/flutter/BUILD.gn

-# Copyright 2015 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-action("sky") {
-  script = "//sky/build/symlink.py"
-
-  stamp_file = "$target_gen_dir/symlink.stamp"
-
-  sources = [ "pubspec.yaml" ]
-  outputs = [ stamp_file ]
-
-  args = [
-    rebase_path("lib", root_build_dir),
-    rebase_path("$root_gen_dir/dart-pkg/packages/sky", root_build_dir),
-    "--touch",
-    rebase_path(stamp_file, root_build_dir)
-  ]
-
-  deps = [
-    "//mojo/dart/mojo_services",
-    "//mojo/dart/mojom",
-    "//mojo/public/dart:mojo",
-    "//sky/packages/sky_engine",
-    "//sky/packages/sky_services",
-  ]
-}
-
-group("sdk") {
-  deps = [
-    ":sky",
-  ]
-}

packages/flutter/example/BUILD.gn

@@ -6,11 +6,11 @@ group("example") {
   testonly = true
 
   deps = [
-    "//sky/sdk/example/demo_launcher",
-    "//sky/sdk/example/game",
-    "//sky/sdk/example/mine_digger",
-    "//sky/sdk/example/rendering",
-    "//sky/sdk/example/stocks",
-    "//sky/sdk/example/widgets",
+    "//sky/packages/sky/example/demo_launcher",
+    "//sky/packages/sky/example/game",
+    "//sky/packages/sky/example/mine_digger",
+    "//sky/packages/sky/example/rendering",
+    "//sky/packages/sky/example/stocks",
+    "//sky/packages/sky/example/widgets",
   ]
 }

packages/flutter/example/demo_launcher/BUILD.gn

@@ -12,17 +12,17 @@ sky_app("demo_launcher") {
     apk_name = "SkyDemo"
 
     bundles = [
-      "//sky/sdk/example/fitness",
-      "//sky/sdk/example/game",
-      "//sky/sdk/example/mine_digger",
-      "//sky/sdk/example/rendering:interactive_flex",
-      "//sky/sdk/example/stocks",
-      "//sky/sdk/example/widgets:cards",
+      "//sky/packages/sky/example/fitness",
+      "//sky/packages/sky/example/game",
+      "//sky/packages/sky/example/mine_digger",
+      "//sky/packages/sky/example/rendering:interactive_flex",
+      "//sky/packages/sky/example/stocks",
+      "//sky/packages/sky/example/widgets:cards",
     ]
 
     deps = [
-      "//sky/sdk/example/demo_launcher/apk:java",
-      "//sky/sdk/example/demo_launcher/apk:resources",
+      "//sky/packages/sky/example/demo_launcher/apk:java",
+      "//sky/packages/sky/example/demo_launcher/apk:resources",
     ]
   }
 }

packages/flutter/example/game/BUILD.gn

@@ -12,7 +12,7 @@ sky_app("game") {
     apk_name = "Asteroids"
 
     deps = [
-      "//sky/sdk/example/game/apk:resources",
+      "//sky/packages/sky/example/game/apk:resources",
     ]
   }
 }

packages/flutter/pubspec.yaml

@@ -2,7 +2,7 @@ name: sky
 version: 0.0.23
 author: Chromium Authors <sky-dev@googlegroups.com>
 description: A framework for writing Sky applications
-homepage: https://github.com/domokit/sky_engine/tree/master/sky/sdk
+homepage: https://github.com/domokit/sky_engine/tree/master/sky/packages/sky
 dependencies:
   cassowary: ^0.1.7
   material_design_icons: ^0.0.2