Clean up a binder registry in DedicatedWorkerHost

This CL cleans up the binder registry in DedicatedWorkerHost
class since WebUsbService mojom interface has been bound via
BrowserInterfaceBroker by https://crrev.com/c/1768839, and
nothing registers a mojo interface to the binder registry.

Bug: 936482
Change-Id: I3c533da40e4c5d7bf03a36ff16185c2cb7a6062c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1941652
Commit-Queue: Miyoung Shin <myid.shin@igalia.com>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719934}

content/browser/worker_host/dedicated_worker_host.cc

@@ -48,7 +48,6 @@ DedicatedWorkerHost::DedicatedWorkerHost(
       origin_(origin),
       host_receiver_(this, std::move(host)) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  RegisterMojoInterfaces();
 }
 
 DedicatedWorkerHost::~DedicatedWorkerHost() = default;
@@ -61,11 +60,6 @@ void DedicatedWorkerHost::GetInterface(
   if (!worker_process_host)
     return;
 
-  // See if the registry that is specific to this worker host wants to handle
-  // the interface request.
-  if (registry_.TryBindInterface(interface_name, &interface_pipe))
-    return;
-
   BindWorkerInterface(interface_name, std::move(interface_pipe),
                       worker_process_host, origin_);
 }
@@ -225,12 +219,6 @@ void DedicatedWorkerHost::StartScriptLoad(
                      weak_factory_.GetWeakPtr()));
 }
 
-void DedicatedWorkerHost::RegisterMojoInterfaces() {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  registry_.AddInterface(base::BindRepeating(
-      &DedicatedWorkerHost::CreateWebUsbService, base::Unretained(this)));
-}
-
 void DedicatedWorkerHost::DidStartScriptLoad(
     std::unique_ptr<blink::URLLoaderFactoryBundleInfo>
         subresource_loader_factories,

content/browser/worker_host/dedicated_worker_host.h

@@ -13,7 +13,6 @@
 #include "mojo/public/cpp/bindings/pending_remote.h"
 #include "mojo/public/cpp/bindings/receiver.h"
 #include "mojo/public/cpp/bindings/remote.h"
-#include "services/service_manager/public/cpp/binder_registry.h"
 #include "services/service_manager/public/mojom/interface_provider.mojom.h"
 #include "third_party/blink/public/mojom/filesystem/file_system.mojom-forward.h"
 #include "third_party/blink/public/mojom/idle/idle_manager.mojom-forward.h"
@@ -114,8 +113,6 @@ class DedicatedWorkerHost final
       mojo::Remote<blink::mojom::DedicatedWorkerHostFactoryClient> client);
 
  private:
-  void RegisterMojoInterfaces();
-
   // Called from WorkerScriptFetchInitiator. Continues starting the dedicated
   // worker in the renderer process.
   //
@@ -181,8 +178,6 @@ class DedicatedWorkerHost final
 
   std::unique_ptr<ServiceWorkerNavigationHandle> service_worker_handle_;
 
-  service_manager::BinderRegistry registry_;
-
   BrowserInterfaceBrokerImpl<DedicatedWorkerHost, const url::Origin&> broker_{
       this};
   mojo::Receiver<blink::mojom::BrowserInterfaceBroker> broker_receiver_{