Dart: Runs dartanalyzer for the dart_pkg build rule.

mojo/public/dart/BUILD.gn

 import("../mojo_sdk.gni")
 import("rules.gni")
 
-dart_mojo_sdk_sources = [
+dart_mojo_sdk_entrypoints = [
   "lib/application.dart",
   "lib/bindings.dart",
   "lib/core.dart",
+]
+
+dart_mojo_sdk_sources = [
   "lib/src/application_connection.dart",
   "lib/src/application.dart",
   "lib/src/buffer.dart",
   "lib/src/codec.dart",
   "lib/src/control_message.dart",
   "lib/src/data_pipe.dart",
   "lib/src/drain_data.dart",
   "lib/src/event_stream.dart",
   "lib/src/handle.dart",
   "lib/src/message.dart",
   "lib/src/message_pipe.dart",
   "lib/src/proxy.dart",
   "lib/src/struct.dart",
   "lib/src/stub.dart",
   "lib/src/union.dart",
   "lib/src/types.dart",
 ]
 
 dartzip_package("dart") {
-  sources = dart_mojo_sdk_sources + [
+  sources = dart_mojo_sdk_entrypoints + dart_mojo_sdk_sources + [
               "pubspec.yaml",
               "CHANGELOG.md",
               "README.md",
             ]
   uses_pub = true
   package_name_override = "mojo"
   deps = [
     "../interfaces/application",
     "../interfaces/bindings",
     "../interfaces/network",
   ]
 }
 
 dart_pkg("mojo") {
+  entrypoints = dart_mojo_sdk_entrypoints
   sources = dart_mojo_sdk_sources + [
               "pubspec.yaml",
               "CHANGELOG.md",
               "README.md",
             ]
 
   sdk_ext_directory = "sdk_ext"
   sdk_ext_mappings = [ "dart:mojo.internal,internal.dart" ]
 
   # List of mojom targets that the mojo pkg exports
   deps = [
     "../interfaces",
   ]
 }