Use Independent URLLoader

content/common/throttling_url_loader.h

Index: content/common/throttling_url_loader.h
diff --git a/content/common/throttling_url_loader.h b/content/common/throttling_url_loader.h
index 11e34a2320ab7f6515d736add80fcf7f0559c418..37f09a278cde7e9b19cb648e71e08c57f85f6459 100644
--- a/content/common/throttling_url_loader.h
+++ b/content/common/throttling_url_loader.h
@@ -11,7 +11,6 @@
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/common/content_export.h"
-#include "content/common/possibly_associated_interface_ptr.h"
 #include "content/common/url_loader.mojom.h"
 #include "content/common/url_loader_factory.mojom.h"
 #include "content/public/common/url_loader_throttle.h"
@@ -128,7 +127,7 @@ class CONTENT_EXPORT ThrottlingURLLoader : public mojom::URLLoaderClient,
   mojom::URLLoaderClient* forwarding_client_;
   mojo::Binding<mojom::URLLoaderClient> client_binding_;
 
-  PossiblyAssociatedInterfacePtr<mojom::URLLoader> url_loader_;
+  mojom::URLLoaderPtr url_loader_;
 
   struct StartInfo {
     StartInfo(mojom::URLLoaderFactory* in_url_loader_factory,