Run dartfmt on all files under runtime.

runtime/observatory/tests/observatory_ui/mocks/objects/library.dart

Index: runtime/observatory/tests/observatory_ui/mocks/objects/library.dart
diff --git a/runtime/observatory/tests/observatory_ui/mocks/objects/library.dart b/runtime/observatory/tests/observatory_ui/mocks/objects/library.dart
index 0f29ac21c180d384a3e6291676e1bb08dd7245ba..4d4f67f7140a4c06622e1eddc2ffe20166d566de 100644
--- a/runtime/observatory/tests/observatory_ui/mocks/objects/library.dart
+++ b/runtime/observatory/tests/observatory_ui/mocks/objects/library.dart
@@ -21,14 +21,23 @@ class LibraryMock implements M.Library {
   final bool debuggable;
   final Iterable<M.LibraryDependency> dependencies;
   final Iterable<M.ScriptRef> scripts;
-  final Iterable<M.ClassRef> classes;  final Iterable<M.FieldRef> variables;
+  final Iterable<M.ClassRef> classes;
+  final Iterable<M.FieldRef> variables;
   final Iterable<M.FunctionRef> functions;
   final M.ScriptRef rootScript;
 
-  const LibraryMock({this.id: 'library-id', this.name: 'library-name',
-                     this.vmName: 'library-vmName', this.clazz, this.size,
-                     this.uri, this.debuggable, this.dependencies: const [],
-                     this.scripts: const [], this.classes: const [],
-                     this.variables: const [], this.functions: const [],
-                     this.rootScript: const ScriptRefMock()});
+  const LibraryMock(
+      {this.id: 'library-id',
+      this.name: 'library-name',
+      this.vmName: 'library-vmName',
+      this.clazz,
+      this.size,
+      this.uri,
+      this.debuggable,
+      this.dependencies: const [],
+      this.scripts: const [],
+      this.classes: const [],
+      this.variables: const [],
+      this.functions: const [],
+      this.rootScript: const ScriptRefMock()});
 }