Initial Bazel file resolver support.

pkg/analysis_server/lib/starter.dart

Index: pkg/analysis_server/lib/starter.dart
diff --git a/pkg/analysis_server/lib/starter.dart b/pkg/analysis_server/lib/starter.dart
index 42c9861e10f16398d167b642e74e497be2cf5171..be8aba7cc133a46341009fab7562ec98d8025b91 100644
--- a/pkg/analysis_server/lib/starter.dart
+++ b/pkg/analysis_server/lib/starter.dart
@@ -27,6 +27,13 @@ abstract class ServerStarter {
   void set instrumentationServer(InstrumentationServer server);
 
   /**
+   * Set the file resolver provider used to override the way file URI's
+   * are resolved in some contexts. The provider should return `null` if the
+   * default file resolution scheme should be used instead.
+   */
+  void set fileResolverProvider(ResolverProvider provider);
+
+  /**
    * Set the package resolver provider used to override the way package URI's
    * are resolved in some contexts. The provider should return `null` if the
    * default package resolution scheme should be used instead.