Roll Dart to 82e9557aa78cc1ff43ea60bc443758558bbe4d99 (#3950)

DEPS

@@ -30,7 +30,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_fluter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': 'a67d798841ec6379c39c6cd20e9b867689df0e64',
+  'dart_revision': '82e9557aa78cc1ff43ea60bc443758558bbe4d99',
 
   'dart_args_tag': '0.13.7',
   'dart_async_tag': 'daf66909019d2aaec1721fc39d94ea648a9fdc1d',

travis/licenses_golden/licenses_dart

-Signature: c3d9128ec5d67bc82b246c20b7d2f9a7
+Signature: 736f3eee97ce76936e495a9f0f5179b3
 
 UNUSED LICENSES:
 
@@ -551,7 +551,6 @@ FILE: ../../../dart/runtime/observatory/lib/src/elements/class_tree.dart
 FILE: ../../../dart/runtime/observatory/lib/src/elements/debugger.dart
 FILE: ../../../dart/runtime/observatory/lib/src/elements/heap_map.dart
 FILE: ../../../dart/runtime/observatory/lib/src/elements/isolate_reconnect.dart
-FILE: ../../../dart/runtime/observatory/lib/src/elements/memory_dashboard.dart
 FILE: ../../../dart/runtime/observatory/lib/src/elements/metrics.dart
 FILE: ../../../dart/runtime/observatory/lib/src/elements/vm_connect.dart
 FILE: ../../../dart/runtime/observatory/lib/src/service/object.dart
@@ -1558,6 +1557,9 @@ FILE: ../../../dart/runtime/bin/sync_socket_patch.dart
 FILE: ../../../dart/runtime/bin/sync_socket_unsupported.cc
 FILE: ../../../dart/runtime/bin/sync_socket_win.cc
 FILE: ../../../dart/runtime/lib/async.cc
+FILE: ../../../dart/runtime/observatory/lib/src/elements/memory/dashboard.dart
+FILE: ../../../dart/runtime/observatory/lib/src/elements/memory/graph.dart
+FILE: ../../../dart/runtime/observatory/lib/src/elements/memory/profile.dart
 FILE: ../../../dart/runtime/observatory/lib/src/elements/nav/reload.dart
 FILE: ../../../dart/runtime/observatory/lib/src/elements/singletargetcache_ref.dart
 FILE: ../../../dart/runtime/observatory/lib/src/elements/singletargetcache_view.dart