Fork some more files from the old framework, so that the transition will be easier to perform.

sky/sdk/BUILD.gn

Index: sky/sdk/BUILD.gn
diff --git a/sky/sdk/BUILD.gn b/sky/sdk/BUILD.gn
index d568f13dcc3cb4d68e350a8284af659812db9b0c..45e317c4768e709d3c9d240299ef933bb977b777 100644
--- a/sky/sdk/BUILD.gn
+++ b/sky/sdk/BUILD.gn
@@ -9,9 +9,16 @@ dart_pkg("sdk") {
     "CHANGELOG.md",
     "README.md",
     "bin/init.dart",
+    "lib/animation/animated_value.dart",
+    "lib/animation/curves.dart",
+    "lib/animation/fling_curve.dart",
+    "lib/animation/generators.dart",
+    "lib/animation/mechanics.dart",
+    "lib/animation/scroll_behavior.dart",
     "lib/app/scheduler.dart",
     "lib/assets/.gitignore",
     "lib/assets/material-design-icons.sha1",
+    "lib/debug/utils.dart",
     "lib/download_material_design_icons",
     "lib/editing2/editable_string.dart",
     "lib/editing2/editable_text.dart",
@@ -49,7 +56,6 @@ dart_pkg("sdk") {
     "lib/framework/components/tool_bar.dart",
     "lib/framework/debug/shake-to-reload.sky",
     "lib/framework/debug/tracing.dart",
-    "lib/framework/debug/utils.dart",
     "lib/framework/editing/editable_string.dart",
     "lib/framework/editing/editable_text.dart",
     "lib/framework/editing/keyboard.dart",
@@ -66,6 +72,10 @@ dart_pkg("sdk") {
     "lib/framework/theme/typography.dart",
     "lib/framework/theme/view_configuration.dart",
     "lib/internals.dart",
+    "lib/mojo/embedder.dart",
+    "lib/mojo/net/fetch.dart",
+    "lib/mojo/net/image_cache.dart",
+    "lib/mojo/shell.dart",
     "lib/painting/box_painter.dart",
     "lib/painting/shadows.dart",
     "lib/painting/text_style.dart",