fix a doctor check for webstorm (#8450)

* fix a doctor check for webstorm

* fix a missing reference

packages/flutter_tools/lib/src/doctor.dart

@@ -275,8 +275,13 @@ abstract class IntelliJValidator extends DoctorValidator {
 
     int installCount = 0;
 
-    if (_validateHasPackage(messages, 'Dart', 'Dart'))
+    if (isWebStorm) {
+      // Dart is bundled with WebStorm.
       installCount++;
+    } else {
+      if (_validateHasPackage(messages, 'Dart', 'Dart'))
+        installCount++;
+    }
 
     if (_validateHasPackage(messages, 'flutter-intellij.jar', 'Flutter'))
       installCount++;
@@ -295,6 +300,8 @@ abstract class IntelliJValidator extends DoctorValidator {
     );
   }
 
+  bool get isWebStorm => title == 'WebStorm';
+
   bool _validateHasPackage(List<ValidationMessage> messages, String packageName, String title) {
     if (!hasPackage(packageName)) {
       messages.add(new ValidationMessage(

packages/flutter_tools/lib/src/ios/ios_workflow.dart

@@ -132,13 +132,12 @@ class IOSWorkflow extends DoctorValidator implements Workflow {
         brewStatus = ValidationType.partial;
         if (hasIosDeploy) {
           messages.add(new ValidationMessage.error(
-            'ios-deploy out of date: $iosDeployMinimumVersion is required.\n'
-            'Upgrade via \'brew upgrade ios-deploy\'.'
+            'ios-deploy out of date ($iosDeployMinimumVersion is required): '
+            'upgrade via \'brew upgrade ios-deploy\'.'
           ));
         } else {
           messages.add(new ValidationMessage.error(
-            'ios-deploy not installed: $iosDeployMinimumVersion is required.\n'
-            'Install via \'brew install ios-deploy\'.'
+            'ios-deploy not installed: install via \'brew install ios-deploy\'.'
           ));
         }
       } else {