diff --git a/DEPS b/DEPS
index 5ab1ef68378..dfb3033cf2e 100644
--- a/DEPS
+++ b/DEPS
@@ -31,7 +31,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '011676641a8b4b77bb372384c712709cbf037675',
+  'dart_revision': '4c9b71205262699764c5db74e95bc9e702451f4e',
 
   'dart_args_tag': '1.4.1',
   'dart_async_tag': '2.0.6',
@@ -47,8 +47,8 @@ vars = {
   'dart_crypto_tag': '2.0.2+1',
   'dart_csslib_tag': '0.14.1',
   'dart_dart2js_info_tag': '0.5.6+2',
-  'dart_dart_style_tag': '1.0.11',
-  'dart_dartdoc_tag': 'v0.18.1',
+  'dart_dart_style_tag': '1.0.12',
+  'dart_dartdoc_tag': 'v0.19.0',
   'dart_fixnum_tag': '0.10.5',
   'dart_glob_tag': '1.1.5',
   'dart_html_tag': '0.13.3',
@@ -65,7 +65,7 @@ vars = {
   'dart_matcher_tag': '0.12.1+4',
   'dart_mime_tag': '0.9.6',
   'dart_mockito_tag': 'a92db054fba18bc2d605be7670aee74b7cadc00a',
-  'dart_mustache4dart_tag': 'v2.1.0',
+  'dart_mustache4dart_tag': 'v2.1.1',
   'dart_oauth2_tag': '1.1.0',
   'dart_observatory_pub_packages_rev': 'd3a3aebefbd35aa30fe7bbc2889b772b398f7d7f',
   'dart_package_config_tag': '1.0.3',
diff --git a/runtime/dart_isolate.cc b/runtime/dart_isolate.cc
index 63c0a5350a9..2c4a11c92c8 100644
--- a/runtime/dart_isolate.cc
+++ b/runtime/dart_isolate.cc
@@ -409,7 +409,10 @@ bool DartIsolate::MarkIsolateRunnable() {
   // There must be no current isolate to mark an isolate as being runnable.
   Dart_ExitIsolate();
 
-  if (!Dart_IsolateMakeRunnable(isolate())) {
+  char* error = Dart_IsolateMakeRunnable(isolate());
+  if (error) {
+    FXL_DLOG(ERROR) << error;
+    ::free(error);
     // Failed. Restore the isolate.
     Dart_EnterIsolate(isolate());
     return false;
diff --git a/runtime/dart_service_isolate.cc b/runtime/dart_service_isolate.cc
index 54c0bf97225..3239e4f437e 100644
--- a/runtime/dart_service_isolate.cc
+++ b/runtime/dart_service_isolate.cc
@@ -137,11 +137,10 @@ bool DartServiceIsolate::Startup(std::string server_ip,
   // Make runnable.
   Dart_ExitScope();
   Dart_ExitIsolate();
-  bool retval = Dart_IsolateMakeRunnable(isolate);
-  if (!retval) {
+  *error = Dart_IsolateMakeRunnable(isolate);
+  if (*error) {
     Dart_EnterIsolate(isolate);
     Dart_ShutdownIsolate();
-    *error = strdup("Invalid isolate state - Unable to make it runnable.");
     return false;
   }
   Dart_EnterIsolate(isolate);
diff --git a/runtime/dart_vm.cc b/runtime/dart_vm.cc
index fa827ef477f..15314d04b45 100644
--- a/runtime/dart_vm.cc
+++ b/runtime/dart_vm.cc
@@ -383,7 +383,11 @@ DartVM::DartVM(const Settings& settings,
   for (size_t i = 0; i < settings.dart_flags.size(); i++)
     args.push_back(settings.dart_flags[i].c_str());
 
-  FXL_CHECK(Dart_SetVMFlags(args.size(), args.data()));
+  char* flags_error = Dart_SetVMFlags(args.size(), args.data());
+  if (flags_error) {
+    FXL_LOG(FATAL) << "Error while setting Dart VM flags: " << flags_error;
+    ::free(flags_error);
+  }
 
   DartUI::InitForGlobal();
 
diff --git a/travis/licenses_golden/licenses_third_party b/travis/licenses_golden/licenses_third_party
index f57f2fbce4f..f01e6787474 100644
--- a/travis/licenses_golden/licenses_third_party
+++ b/travis/licenses_golden/licenses_third_party
@@ -1,4 +1,4 @@
-Signature: 759192b81fc370d3de4de0d021329916
+Signature: 0bb9afe000319cd63fc59230bab57873
 
 UNUSED LICENSES:
 
@@ -5663,7 +5663,6 @@ FILE: ../../../third_party/dart/runtime/bin/vmservice/server.dart
 FILE: ../../../third_party/dart/runtime/bin/vmservice/vmservice_io.dart
 FILE: ../../../third_party/dart/runtime/bin/vmservice_impl.cc
 FILE: ../../../third_party/dart/runtime/bin/vmservice_impl.h
-FILE: ../../../third_party/dart/runtime/include/dart_mirrors_api.h
 FILE: ../../../third_party/dart/runtime/include/dart_native_api.h
 FILE: ../../../third_party/dart/runtime/lib/collection_patch.dart
 FILE: ../../../third_party/dart/runtime/lib/core_patch.dart
@@ -5800,7 +5799,6 @@ FILE: ../../../third_party/dart/runtime/vm/isolate.cc
 FILE: ../../../third_party/dart/runtime/vm/isolate.h
 FILE: ../../../third_party/dart/runtime/vm/json_stream.cc
 FILE: ../../../third_party/dart/runtime/vm/json_stream.h
-FILE: ../../../third_party/dart/runtime/vm/mirrors_api_impl.cc
 FILE: ../../../third_party/dart/runtime/vm/native_api_impl.cc
 FILE: ../../../third_party/dart/runtime/vm/native_symbol.h
 FILE: ../../../third_party/dart/runtime/vm/native_symbol_android.cc