content::ResourceDispatcherHostImpl changes for stale-while-revalidate

content/browser/loader/resource_request_info_impl.h

Index: content/browser/loader/resource_request_info_impl.h
diff --git a/content/browser/loader/resource_request_info_impl.h b/content/browser/loader/resource_request_info_impl.h
index afc30fff60f001720b3c58b476df6da8f2a84726..1f7bd1e50592415b69d3bd6abe67b3404693d13d 100644
--- a/content/browser/loader/resource_request_info_impl.h
+++ b/content/browser/loader/resource_request_info_impl.h
@@ -18,6 +18,8 @@
 #include "content/public/common/resource_type.h"
 #include "net/base/load_states.h"
 
+struct ResourceHostMsg_Request;
+
 namespace content {
 class CrossSiteResourceHandler;
 class DetachableResourceHandler;
@@ -39,6 +41,9 @@ class ResourceRequestInfoImpl : public ResourceRequestInfo,
   CONTENT_EXPORT static const ResourceRequestInfoImpl* ForRequest(
       const net::URLRequest* request);
 
+  // TODO(ricea): Something about this constructor.
+  // |original_request| is owned by the caller. If non-NULL, it is copied by
+  // the constructor.
   CONTENT_EXPORT ResourceRequestInfoImpl(
       int process_type,
       int child_id,
@@ -64,7 +69,9 @@ class ResourceRequestInfoImpl : public ResourceRequestInfo,
       blink::WebPageVisibilityState visibility_state,
       ResourceContext* context,
       base::WeakPtr<ResourceMessageFilter> filter,
-      bool is_async);
+      bool is_async,
+      bool is_async_revalidation,
+      const ResourceHostMsg_Request* original_request);
   ~ResourceRequestInfoImpl() override;
 
   // ResourceRequestInfo implementation:
@@ -88,6 +95,7 @@ class ResourceRequestInfoImpl : public ResourceRequestInfo,
                                 int* render_frame_id) const override;
   bool IsAsync() const override;
   bool IsDownload() const override;
+  bool IsAsyncRevalidation() const override;
 
   CONTENT_EXPORT void AssociateWithRequest(net::URLRequest* request);
 
@@ -178,6 +186,9 @@ class ResourceRequestInfoImpl : public ResourceRequestInfo,
   void set_do_not_prompt_for_login(bool do_not_prompt) {
     do_not_prompt_for_login_ = do_not_prompt;
   }
+  ResourceHostMsg_Request* original_request() {
+    return original_request_.get();
+  }
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
@@ -217,7 +228,15 @@ class ResourceRequestInfoImpl : public ResourceRequestInfo,
   // The filter might be deleted without deleting this object if the process
   // exits during a transfer.
   base::WeakPtr<ResourceMessageFilter> filter_;
+
+  // Original request information required to clone the request if an async
+  // revalidation will be performed. NULL if async revalidation is not
+  // applicable to this request (eg. it is already an async revalidation, is not
+  // method "GET", etc.).
+  scoped_ptr<ResourceHostMsg_Request> original_request_;
+
   bool is_async_;
+  bool is_async_revalidation_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceRequestInfoImpl);
 };