Use a mojo::StrongBindingSet to manage PermissionServiceImpls

content/browser/permissions/permission_service_impl.h

Index: content/browser/permissions/permission_service_impl.h
diff --git a/content/browser/permissions/permission_service_impl.h b/content/browser/permissions/permission_service_impl.h
index 7617697a524a0753652fe30f788c7954025455dd..cfce9155afdf1bf9a3b0ee39cca9d92df2aa0e8c 100644
--- a/content/browser/permissions/permission_service_impl.h
+++ b/content/browser/permissions/permission_service_impl.h
@@ -10,7 +10,6 @@
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "content/browser/permissions/permission_service_context.h"
-#include "mojo/public/cpp/bindings/binding.h"
 #include "third_party/WebKit/public/platform/modules/permissions/permission.mojom.h"
 #include "url/origin.h"
 
@@ -27,16 +26,9 @@ enum class PermissionType;
 // WebContents for example.
 class PermissionServiceImpl : public blink::mojom::PermissionService {
  public:
-  PermissionServiceImpl(
-      PermissionServiceContext* context,
-      mojo::InterfaceRequest<blink::mojom::PermissionService> request);
+  PermissionServiceImpl(PermissionServiceContext* context);
   ~PermissionServiceImpl() override;
 
-  // Clear pending operations currently run by the service. This will be called
-  // by PermissionServiceContext when it will need the service to clear its
-  // state for example, if the frame changes.
-  void CancelPendingOperations();
-
  private:
   using PermissionStatusCallback =
       base::Callback<void(blink::mojom::PermissionStatus)>;
@@ -75,8 +67,6 @@ class PermissionServiceImpl : public blink::mojom::PermissionService {
       blink::mojom::PermissionStatus last_known_status,
       blink::mojom::PermissionObserverPtr observer) override;
 
-  void OnConnectionError();
-
   void OnRequestPermissionResponse(int pending_request_id,
                                    blink::mojom::PermissionStatus status);
   void OnRequestPermissionsResponse(
@@ -94,7 +84,6 @@ class PermissionServiceImpl : public blink::mojom::PermissionService {
   RequestsMap pending_requests_;
   // context_ owns |this|.
   PermissionServiceContext* context_;
-  mojo::Binding<blink::mojom::PermissionService> binding_;
   base::WeakPtrFactory<PermissionServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionServiceImpl);