Call refreshViews after every restart (#5479)

packages/flutter_tools/lib/src/commands/run.dart

@@ -70,7 +70,9 @@ class RunCommand extends RunCommandBase {
 
     // Option to write the pid to a file.
     argParser.addOption('pid-file',
-                        help: 'Specify a file to write the process id to.');
+                        help: 'Specify a file to write the process id to.'
+                              'You can send SIGUSR1 to trigger a hot reload '
+                              'and SIGUSR2 to trigger a full restart.');
 
 
     // Hidden option to enable a benchmarking mode. This will run the given

packages/flutter_tools/lib/src/resident_runner.dart

@@ -47,10 +47,16 @@ abstract class ResidentRunner {
   }
 
   Future<Null> _debugDumpApp() async {
+    if (vmService != null)
+      await vmService.vm.refreshViews();
+
     await currentView.uiIsolate.flutterDebugDumpApp();
   }
 
   Future<Null> _debugDumpRenderTree() async {
+    if (vmService != null)
+      await vmService.vm.refreshViews();
+    
     await currentView.uiIsolate.flutterDebugDumpRenderTree();
   }
 

packages/flutter_tools/lib/src/vmservice.dart

@@ -886,6 +886,7 @@ class FlutterView extends ServiceObject {
                              packagesPath,
                              assetsDirectoryPath);
     await completer.future;
+    await owner.vm.refreshViews();
     await subscription.cancel();
   }