Privatize StrongBinding lifetime management

chrome/browser/media/output_protection_impl.h

Index: chrome/browser/media/output_protection_impl.h
diff --git a/chrome/browser/media/output_protection_impl.h b/chrome/browser/media/output_protection_impl.h
index 54fb916973b4972d0a2db8214efc6ead140e5c14..cab0c96b445a5302ba7c29469663cd49f316890c 100644
--- a/chrome/browser/media/output_protection_impl.h
+++ b/chrome/browser/media/output_protection_impl.h
@@ -7,7 +7,6 @@
 
 #include "content/public/browser/render_frame_host.h"
 #include "media/mojo/interfaces/output_protection.mojom.h"
-#include "mojo/public/cpp/bindings/strong_binding.h"
 
 // Implements media::mojom::OutputProtection to check display links and
 // their statuses. On all platforms we'll check the network links. On ChromeOS
@@ -18,8 +17,7 @@ class OutputProtectionImpl : public media::mojom::OutputProtection {
       content::RenderFrameHost* render_frame_host,
       mojo::InterfaceRequest<media::mojom::OutputProtection> request);
 
-  OutputProtectionImpl(content::RenderFrameHost* render_frame_host,
-                       mojo::InterfaceRequest<OutputProtection> request);
+  explicit OutputProtectionImpl(content::RenderFrameHost* render_frame_host);
   ~OutputProtectionImpl() final;
 
   // media::mojom::OutputProtection implementation.
@@ -28,8 +26,6 @@ class OutputProtectionImpl : public media::mojom::OutputProtection {
                         const EnableProtectionCallback& callback) final;
 
  private:
-  mojo::StrongBinding<media::mojom::OutputProtection> binding_;
-
   content::RenderFrameHost* const render_frame_host_;
 
   base::WeakPtrFactory<OutputProtectionImpl> weak_factory_;