Add experimental code behind a flag for Content Size Policy

content/browser/loader/resource_dispatcher_host_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This is the browser side of the resource dispatcher, it receives requests
 // from the child process (i.e. [Renderer, Plugin, Worker]ProcessHost), and
 // dispatches them to URLRequests. It then forwards the messages from the
 // URLRequests back to the correct process for handling.
 //
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
@@ skipping 40 matching lines @@
 }
 
 namespace storage {
 class ShareableFileReference;
 }
 
 namespace content {
 class AppCacheService;
 class AsyncRevalidationManager;
 class CertStore;
+class ContentSizeResourceHandlerManager;
 class LoaderDelegate;
 class NavigationURLLoaderImplCore;
 class RenderFrameHostImpl;
 class ResourceContext;
 class ResourceDispatcherHostDelegate;
 class ResourceMessageDelegate;
 class ResourceMessageFilter;
 class ResourceRequestInfoImpl;
 class SaveFileManager;
 class ServiceWorkerNavigationHandleCore;
@@ skipping 187 matching lines @@
   // the caller must send it to the old resource handler instead of cancelling
   // it.
   virtual std::unique_ptr<ResourceHandler> MaybeInterceptAsStream(
       const base::FilePath& plugin_path,
       net::URLRequest* request,
       ResourceResponse* response,
       std::string* payload);
 
   ResourceScheduler* scheduler() { return scheduler_.get(); }
 
+  ContentSizeResourceHandlerManager* content_size_manager() {
+    return content_size_manager_.get();
+  }
+
   // Called by a ResourceHandler when it's ready to start reading data and
   // sending it to the renderer. Returns true if there are enough file
   // descriptors available for the shared memory buffer. If false is returned,
   // the request should cancel.
   bool HasSufficientResourcesForRequest(net::URLRequest* request);
 
   // Called by a ResourceHandler after it has finished its request and is done
   // using its shared memory buffer. Frees up that file descriptor to be used
   // elsewhere.
   void FinishedWithResourcesForRequest(net::URLRequest* request);
@@ skipping 342 matching lines @@
   // 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_;
 
   std::unique_ptr<ResourceScheduler> scheduler_;
 
+  std::unique_ptr<ContentSizeResourceHandlerManager> content_size_manager_;
+
   // Allows tests to use a mock CertStore. If set, the CertStore must
   // outlive this ResourceDispatcherHostImpl.
   CertStore* cert_store_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_RESOURCE_DISPATCHER_HOST_IMPL_H_