Fix two analyzer warnings.

pkg/analysis_server/lib/src/services/completion/statement/statement_completion.dart

Index: pkg/analysis_server/lib/src/services/completion/statement/statement_completion.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/statement/statement_completion.dart b/pkg/analysis_server/lib/src/services/completion/statement/statement_completion.dart
index 82ca0e94d61fdb369b504d2a174a9e22ca630e24..ac46c766394c796028e780fa262dded6bbeb52d1 100644
--- a/pkg/analysis_server/lib/src/services/completion/statement/statement_completion.dart
+++ b/pkg/analysis_server/lib/src/services/completion/statement/statement_completion.dart
@@ -238,14 +238,14 @@ class StatementCompletionProcessor {
     return text;
   }
 
-  bool _complete_controlFlowBlock() {

[messick, 2017/04/20 17:30:49]

You could fix the warning by calling this method from compute(). Or, you could
wait for my next commit which will do that.

[devoncarew, 2017/04/20 17:37:36]

If this warning will be addressed shortly then I will revert this part of the
CL.

-    //TODO(messick) Implement _complete_controlFlowBlock
-    // Use statement completion to move the cursor to a new line outside the
-    // current block. The statement has no errors in this case. Used to jump
-    // out of do/for/if/while blocks.
-    //TODO(messick) Move has-errors checking into dispatch method.
-    return false;
-  }
+//  bool _complete_controlFlowBlock() {
+//    //TODO(messick) Implement _complete_controlFlowBlock
+//    // Use statement completion to move the cursor to a new line outside the
+//    // current block. The statement has no errors in this case. Used to jump
+//    // out of do/for/if/while blocks.
+//    //TODO(messick) Move has-errors checking into dispatch method.
+//    return false;
+//  }
 
   bool _complete_doStatement() {
     if (errors.isEmpty || node is! DoStatement) {