Revert of Use associated interface on DownloadedTempFile

content/browser/loader/downloaded_temp_file_impl.h

Index: content/browser/loader/downloaded_temp_file_impl.h
diff --git a/content/browser/loader/downloaded_temp_file_impl.h b/content/browser/loader/downloaded_temp_file_impl.h
index 5eaa6582a8ca4b66d062635f5c83e92582f4a8c1..833b2cba9a931346aec604759d9d653f62a328b6 100644
--- a/content/browser/loader/downloaded_temp_file_impl.h
+++ b/content/browser/loader/downloaded_temp_file_impl.h
@@ -9,10 +9,6 @@
 #include "content/common/content_export.h"
 #include "content/common/url_loader_factory.mojom.h"
 
-namespace mojo {
-class AssociatedGroup;
-}
-
 namespace content {
 
 // DownloadedTempFileImpl is created on the download_to_file mode of resource
@@ -21,19 +17,8 @@ namespace content {
 class CONTENT_EXPORT DownloadedTempFileImpl final
     : public mojom::DownloadedTempFile {
  public:
-  // Creates a DownloadedTempFileImpl, binds it as a strong associated
-  // interface, and returns the interface ptr info to be passed to the client.
-  // That means:
-  //  * The DownloadedTempFile object created here is essentially owned by the
-  //    client. It keeps alive until the client destroys the other endpoint.
-  //  * The resulting interface is associated to the given |associated_group|,
-  //    all Mojo IPCs messages that share |associated_group| will arrive in a
-  //    sequence.
-  static mojom::DownloadedTempFileAssociatedPtrInfo
-  Create(mojo::AssociatedGroup* associated_group, int child_id, int request_id);
-
-  static mojom::DownloadedTempFilePtr CreateForTesting(int child_id,
-                                                       int request_id);
+  static mojo::InterfacePtr<mojom::DownloadedTempFile> Create(int child_id,
+                                                              int request_id);
 
   DownloadedTempFileImpl(int child_id, int request_id);
   ~DownloadedTempFileImpl() override;