Revert "simplify build sdk"

tool/build_sdk.sh

 #!/bin/bash
 set -e
 # switch to the root directory of dev_compiler
 cd $( dirname "${BASH_SOURCE[0]}" )/..
 
 echo "*** Patching SDK"
 dart -c tool/patch_sdk.dart tool/input_sdk gen/patched_sdk
 
 echo "*** Compiling SDK to JavaScript"
 
 # TODO(jmesserly): break out dart:html & friends.
-dart -c bin/dartdevc.dart \
+#
+# Right now we can't summarize our SDK, so we can't treat it as a normal
+# explicit input (instead we're implicitly compiling against the user's SDK).
+#
+# Another possible approach is to hard code the dart:* library->module mapping
+# into the compiler itself, so it can emit the correct import.
+#
+dart -c tool/build_sdk.dart \
     --dart-sdk gen/patched_sdk \
     -o lib/runtime/dart_sdk.js \
-    --unsafe-force-compile --no-source-map --no-emit-metadata \
-    dart:_runtime \
-    dart:_debugger \
-    dart:_foreign_helper \
-    dart:_interceptors \
-    dart:_internal \
-    dart:_isolate_helper \
-    dart:_js_embedded_names \
-    dart:_js_helper \
-    dart:_js_mirrors \
-    dart:_js_primitives \
-    dart:_metadata \
-    dart:_native_typed_data \
-    dart:async \
-    dart:collection \
-    dart:convert \
-    dart:core \
-    dart:isolate \
-    dart:js \
-    dart:math \
-    dart:mirrors \
-    dart:typed_data \
-    dart:indexed_db \
-    dart:html \
-    dart:html_common \
-    dart:svg \
-    dart:web_audio \
-    dart:web_gl \
-    dart:web_sql \
     "$@" > tool/sdk_expected_errors.txt