Add a WebContents getter callback in ResourceRequestInfo

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 40a597a3fd50a7bcf50c1b13288e0b39ff35c0ce..5855f4fc921cbc6311ed1cf5fe2864191f6c91ff 100644
--- a/content/browser/loader/resource_request_info_impl.h
+++ b/content/browser/loader/resource_request_info_impl.h
@@ -23,6 +23,7 @@ class CrossSiteResourceHandler;
 class DetachableResourceHandler;
 class ResourceContext;
 class ResourceMessageFilter;
+class WebContents;
 struct GlobalRequestID;
 struct GlobalRoutingID;
 
@@ -93,6 +94,13 @@ class ResourceRequestInfoImpl : public ResourceRequestInfo,
   bool IsUsingLoFi() const override;
   bool ShouldReportRawHeaders() const;
 
+  // Returns a callback that returns a pointer to the WebContents this request
+  // is associated with, or nullptr if it does not exist. The callback should

[nasko, 2015/11/23 17:00:24]

nit: The request itself can be from a context that isn't associated with
WebContents, so wording that "it does not exist" isn't quite correct.

[clamy, 2015/11/23 17:56:53]

Done.

+  // only run on the UI thread.
+  // Note: not all resource requests will be owned by a WebContents. For

[nasko, 2015/11/23 17:00:24]

nit: Capitalize Not.

[clamy, 2015/11/23 17:56:53]

Done.

+  // example, requests made by a ServiceWorker.
+  base::Callback<WebContents*(void)> GetWebContentsForRequest() const;
+
   CONTENT_EXPORT void AssociateWithRequest(net::URLRequest* request);
 
   CONTENT_EXPORT GlobalRequestID GetGlobalRequestID() const;