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 34d05b98164f6f281f92264fcf660b05d3db4ac3..ab95cbbb0d304e1992549dee4f5fca08fcf6184e 100644
--- a/content/browser/loader/resource_request_info_impl.h
+++ b/content/browser/loader/resource_request_info_impl.h
@@ -64,7 +64,8 @@ class ResourceRequestInfoImpl : public ResourceRequestInfo,
       blink::WebPageVisibilityState visibility_state,
       ResourceContext* context,
       base::WeakPtr<ResourceMessageFilter> filter,
-      bool is_async);
+      bool is_async,
+      const std::string& original_headers);
   ~ResourceRequestInfoImpl() override;
 
   // ResourceRequestInfo implementation:
@@ -178,6 +179,9 @@ class ResourceRequestInfoImpl : public ResourceRequestInfo,
   void set_do_not_prompt_for_login(bool do_not_prompt) {
     do_not_prompt_for_login_ = do_not_prompt;
   }
+  const std::string& original_headers() const {
+    return original_headers_;
+  }
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
@@ -218,6 +222,7 @@ class ResourceRequestInfoImpl : public ResourceRequestInfo,
   // exits during a transfer.
   base::WeakPtr<ResourceMessageFilter> filter_;
   bool is_async_;
+  const std::string original_headers_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceRequestInfoImpl);
 };