Roll Dart forward and use the shared vmservice isolate sources + benchmark fixes

mojo/tools/data/benchmarks

Index: mojo/tools/data/benchmarks
diff --git a/mojo/tools/data/benchmarks b/mojo/tools/data/benchmarks
index b1eba3083b7389dc402f6c1c7a83969ead9fea66..21e8cb56a793bec83844e5eb86418d98e14d7a69 100644
--- a/mojo/tools/data/benchmarks
+++ b/mojo/tools/data/benchmarks
@@ -15,6 +15,9 @@ benchmarks = [
         'name': 'accept connection',
         'spec': 'time_between/Dart/initialized/Dart/connected',
       }
+    ],
+    'shell-args': [
+      '--args-for=mojo:dart_content_handler --complete-timeline',
     ]
   },
   {
@@ -26,6 +29,9 @@ benchmarks = [
         'name': 'initialize',
         'spec': 'time_between/Dart/connecting/Dart/initialized',
       }
+    ],
+    'shell-args': [
+      '--args-for=mojo:dart_content_handler --complete-timeline',
     ]
   },
   {
@@ -43,7 +49,7 @@ benchmarks = [
       }
     ],
     'shell-args': [
-      '--args-for=mojo:dart_content_handler --disable-observatory',
+      '--args-for=mojo:dart_content_handler --disable-observatory --complete-timeline',
     ]
   },
   {
@@ -61,7 +67,7 @@ benchmarks = [
       }
     ],
     'shell-args': [
-      '--args-for=mojo:dart_content_handler --run-on-message-loop',
+      '--args-for=mojo:dart_content_handler --run-on-message-loop --complete-timeline',
     ]
   },
   {