Add Google Charts to Observatory and use it in allocation profiler

runtime/bin/vmservice/client/lib/src/observatory/application.dart

Index: runtime/bin/vmservice/client/lib/src/observatory/application.dart
diff --git a/runtime/bin/vmservice/client/lib/src/observatory/application.dart b/runtime/bin/vmservice/client/lib/src/observatory/application.dart
index 1c491ea14dbe9a7778156d3064fde3f450d375fa..87017f9d7d96eafaf37b39ad2a1ba25197ccad6a 100644
--- a/runtime/bin/vmservice/client/lib/src/observatory/application.dart
+++ b/runtime/bin/vmservice/client/lib/src/observatory/application.dart
@@ -31,10 +31,6 @@ class ObservatoryApplication extends Observable {
       requestManager = new HttpRequestManager(),
       isolateManager = new IsolateManager() {
     _setup();
-    Logger.root.level = Level.INFO;
-    Logger.root.onRecord.listen((LogRecord rec) {
-      print('${rec.level.name}: ${rec.time}: ${rec.message}');
-    });
   }
 
   /// Return the [Isolate] with [id].
@@ -66,6 +62,6 @@ class ObservatoryApplication extends Observable {
   }
 
   static String timeUnits(double x) {
-    return x.toStringAsFixed(4);
+    return x.toStringAsFixed(2);
   }
 }