Privatize StrongBinding lifetime management

extensions/browser/api/mime_handler_private/mime_handler_private.h

Index: extensions/browser/api/mime_handler_private/mime_handler_private.h
diff --git a/extensions/browser/api/mime_handler_private/mime_handler_private.h b/extensions/browser/api/mime_handler_private/mime_handler_private.h
index 432c40dc9067bf670e95d5971531309759e1f45f..3c6318d208e1267e705d485902a2e5c38023d3f8 100644
--- a/extensions/browser/api/mime_handler_private/mime_handler_private.h
+++ b/extensions/browser/api/mime_handler_private/mime_handler_private.h
@@ -8,7 +8,6 @@
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "extensions/common/api/mime_handler.mojom.h"
-#include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace extensions {
 class StreamContainer;
@@ -16,18 +15,16 @@ class MimeHandlerServiceImplTest;
 
 class MimeHandlerServiceImpl : public mime_handler::MimeHandlerService {
  public:
-  static void Create(
-      base::WeakPtr<StreamContainer> stream_container,
-      mojo::InterfaceRequest<mime_handler::MimeHandlerService> request);
+  explicit MimeHandlerServiceImpl(
+      base::WeakPtr<StreamContainer> stream_container);
+  ~MimeHandlerServiceImpl() override;
+
+  static void Create(base::WeakPtr<StreamContainer> stream_container,
+                     mime_handler::MimeHandlerServiceRequest request);
 
  private:
   friend class MimeHandlerServiceImplTest;
 
-  MimeHandlerServiceImpl(
-      base::WeakPtr<StreamContainer> stream_container,
-      mojo::InterfaceRequest<mime_handler::MimeHandlerService> request);
-  ~MimeHandlerServiceImpl() override;
-
   // mime_handler::MimeHandlerService overrides.
   void GetStreamInfo(const GetStreamInfoCallback& callback) override;
   void AbortStream(const AbortStreamCallback& callback) override;
@@ -38,8 +35,6 @@ class MimeHandlerServiceImpl : public mime_handler::MimeHandlerService {
   // A handle to the stream being handled by the MimeHandlerViewGuest.
   base::WeakPtr<StreamContainer> stream_;
 
-  mojo::StrongBinding<mime_handler::MimeHandlerService> binding_;
-
   base::WeakPtrFactory<MimeHandlerServiceImpl> weak_factory_;
 };