Enable -Wheader-hygiene for proxygen/PACKAGE +1

Summary:
Per title

#buildmore - Be thorough

#buildsonlynotests - No runtime effects!

 - If you approve of this diff, please use the "Accept & Ship" button

no-ig-test - Doesn't require Instagram testing.

(1 file modified.)

Reviewed By: dmm-fb

Differential Revision: D56538953

fbshipit-source-id: d9cadf63b7c257fd801e92f60437459c44d47451

proxygen/lib/stats/test/PeriodicStatsTestHelper.h

@@ -14,12 +14,10 @@
 #include <folly/portability/GTest.h>
 #include <folly/synchronization/Baton.h>
 
-using namespace proxygen;
-
 template <class T>
 class PeriodicStatsTestHelper {
  public:
-  PeriodicStatsTestHelper(PeriodicStats<T>* psUT) {
+  PeriodicStatsTestHelper(proxygen::PeriodicStats<T>* psUT) {
     psUT_ = psUT;
 
     std::function<void()> refreshCb(
@@ -64,5 +62,5 @@ class PeriodicStatsTestHelper {
   std::atomic<folly::Baton<>*> updateCachedDataBaton_{nullptr};
 
   // Wrapped PeriodicStats insance under test.
-  PeriodicStats<T>* psUT_;
+  proxygen::PeriodicStats<T>* psUT_;
 };