Support compilation of Hello World

BUG=
[email protected]

Review URL: https://codereview.chromium.org/1927963002 .

Author: johnniwinther

pkg/compiler/lib/src/apiimpl.dart

@@ -258,8 +258,7 @@ class CompilerImpl extends Compiler {
       Duration duration = task.duration;
       if (duration != Duration.ZERO) {
         cumulatedDuration += duration;
-        timings.writeln(
-            '    $running${task.name} took'
+        timings.writeln('    $running${task.name} took'
             ' ${duration.inMilliseconds}msec');
         for (String subtask in task.subtasks) {
           int subtime = task.getSubtaskTime(subtask);
@@ -271,10 +270,9 @@ class CompilerImpl extends Compiler {
     }
     Duration unaccountedDuration =
         totalDuration - cumulatedDuration - setupDuration - asyncDuration;
-    double percent = unaccountedDuration.inMilliseconds * 100
-        / totalDuration.inMilliseconds;
-    timings.write(
-        '    Total compile-time ${totalDuration.inMilliseconds}msec;'
+    double percent =
+        unaccountedDuration.inMilliseconds * 100 / totalDuration.inMilliseconds;
+    timings.write('    Total compile-time ${totalDuration.inMilliseconds}msec;'
         ' setup ${setupDuration.inMilliseconds}msec;'
         ' async ${asyncDuration.inMilliseconds}msec;'
         ' unaccounted ${unaccountedDuration.inMilliseconds}msec'

pkg/compiler/lib/src/common/tasks.dart

@@ -4,12 +4,8 @@
 
 library dart2js.common.tasks;
 
-import 'dart:async' show
-    Future,
-    Zone,
-    ZoneDelegate,
-    ZoneSpecification,
-    runZoned;
+import 'dart:async'
+    show Future, Zone, ZoneDelegate, ZoneSpecification, runZoned;
 
 import '../common.dart';
 import '../compiler.dart' show Compiler;
@@ -149,9 +145,8 @@ class CompilerTask {
       }
     }
 
-    return runZoned(
-        action,
-        zoneValues: { measurer: this },
+    return runZoned(action,
+        zoneValues: {measurer: this},
         zoneSpecification: new ZoneSpecification(
             run: run, runUnary: runUnary, runBinary: runBinary));
   }