Handle PlatformVerification loss in ChromeOsCdmFactory

The PlatformVerification mojo object can become invalid during the
lifetime of the CdmFactory, so reset it on error and reconnect it.

BUG=b:153111783
TEST=ChromeOsCdmFactory works across page refreshes

Change-Id: If54667256bcabf8aa2624d6a89c32e4a46f4bcb8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2476727
Commit-Queue: Jeffrey Kardatzke <jkardatzke@google.com>
Commit-Queue: Xiaohan Wang <xhwang@chromium.org>
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Auto-Submit: Jeffrey Kardatzke <jkardatzke@google.com>
Cr-Commit-Position: refs/heads/master@{#818001}

chromeos/components/cdm_factory_daemon/chromeos_cdm_factory.cc

@@ -73,6 +73,9 @@ void ChromeOsCdmFactory::Create(
   if (!platform_verification_) {
     frame_interfaces_->BindEmbedderReceiver(mojo::GenericPendingReceiver(
         platform_verification_.BindNewPipeAndPassReceiver()));
+    platform_verification_.set_disconnect_handler(
+        base::BindOnce(&ChromeOsCdmFactory::OnVerificationMojoConnectionError,
+                       weak_factory_.GetWeakPtr()));
   }
   platform_verification_->IsVerifiedAccessEnabled(base::BindOnce(
       &ChromeOsCdmFactory::OnVerifiedAccessEnabled, weak_factory_.GetWeakPtr(),
@@ -147,7 +150,7 @@ void ChromeOsCdmFactory::OnCreateFactory(
   if (!remote_factory_) {
     remote_factory_.Bind(std::move(remote_factory));
     remote_factory_.set_disconnect_handler(
-        base::BindOnce(&ChromeOsCdmFactory::OnMojoConnectionError,
+        base::BindOnce(&ChromeOsCdmFactory::OnFactoryMojoConnectionError,
                        weak_factory_.GetWeakPtr()));
   }
 
@@ -202,9 +205,14 @@ void ChromeOsCdmFactory::CreateCdm(
       FROM_HERE, base::BindOnce(std::move(cdm_created_cb), std::move(cdm), ""));
 }
 
-void ChromeOsCdmFactory::OnMojoConnectionError() {
+void ChromeOsCdmFactory::OnFactoryMojoConnectionError() {
   DVLOG(1) << __func__;
   remote_factory_.reset();
 }
 
+void ChromeOsCdmFactory::OnVerificationMojoConnectionError() {
+  DVLOG(1) << __func__;
+  platform_verification_.reset();
+}
+
 }  // namespace chromeos

chromeos/components/cdm_factory_daemon/chromeos_cdm_factory.h

@@ -73,7 +73,8 @@ class COMPONENT_EXPORT(CDM_FACTORY_DAEMON) ChromeOsCdmFactory
       const media::SessionKeysChangeCB& session_keys_change_cb,
       const media::SessionExpirationUpdateCB& session_expiration_update_cb,
       media::CdmCreatedCB cdm_created_cb);
-  void OnMojoConnectionError();
+  void OnFactoryMojoConnectionError();
+  void OnVerificationMojoConnectionError();
 
   media::mojom::FrameInterfaceFactory* frame_interfaces_;
   mojo::Remote<cdm::mojom::CdmFactory> remote_factory_;