Remove stale-while-revalidate from content and chrome

content/browser/loader/resource_dispatcher_host_impl.h

Index: content/browser/loader/resource_dispatcher_host_impl.h
diff --git a/content/browser/loader/resource_dispatcher_host_impl.h b/content/browser/loader/resource_dispatcher_host_impl.h
index 86e9e5b3374641ded45b78bf2c350961e4190622..4e7dc4b05abede2eca7e8b986e5e4eb1e4157c1a 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.h
+++ b/content/browser/loader/resource_dispatcher_host_impl.h
@@ -58,7 +58,6 @@ class ShareableFileReference;
 namespace content {
 class AppCacheNavigationHandleCore;
 class AppCacheService;
-class AsyncRevalidationManager;
 class LoaderDelegate;
 class NavigationURLLoaderImplCore;
 class NavigationUIData;
@@ -288,10 +287,6 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
     return num_in_flight_requests_;
   }
 
-  // Turns on stale-while-revalidate support, regardless of command-line flags
-  // or experiment status. For unit tests only.
-  void EnableStaleWhileRevalidateForTesting();
-
   // Sets the LoaderDelegate, which must outlive this object. Ownership is not
   // transferred. The LoaderDelegate should be interacted with on the IO thread.
   void SetLoaderDelegate(LoaderDelegate* loader_delegate);
@@ -771,10 +766,6 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
 
   bool allow_cross_origin_auth_prompt_;
 
-  // AsyncRevalidationManager is non-NULL if and only if
-  // stale-while-revalidate is enabled.
-  std::unique_ptr<AsyncRevalidationManager> async_revalidation_manager_;
-
   typedef std::map<GlobalRequestID,
                    base::ObserverList<ResourceMessageDelegate>*> DelegateMap;
   DelegateMap delegate_map_;