Prepare MediaDrmBridge to work with MediaCodecPlayer

content/browser/media/android/media_drm_credential_manager.cc

Index: content/browser/media/android/media_drm_credential_manager.cc
diff --git a/content/browser/media/android/media_drm_credential_manager.cc b/content/browser/media/android/media_drm_credential_manager.cc
index 8e62770d3f1ae4ca6082f692102bd7d3747f293a..d846bcf004eed4b33b19aa981fd64f7cdd4eb30e 100644
--- a/content/browser/media/android/media_drm_credential_manager.cc
+++ b/content/browser/media/android/media_drm_credential_manager.cc
@@ -100,14 +100,17 @@ bool MediaDrmCredentialManager::ResetCredentialsInternal(
       base::Bind(&MediaDrmCredentialManager::OnResetCredentialsCompleted,
                  base::Unretained(this), security_level);
 
-  if (!media_drm_bridge_->SetSecurityLevel(security_level)) {
+  media::MediaDrmBridge* media_drm_bridge =
+      static_cast<media::MediaDrmBridge*>(media_drm_bridge_.get());
+
+  if (!media_drm_bridge->SetSecurityLevel(security_level)) {
     // No need to reset credentials for unsupported |security_level|.
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(reset_credentials_cb, true));
     return true;
   }
 
-  media_drm_bridge_->ResetDeviceCredentials(reset_credentials_cb);
+  media_drm_bridge->ResetDeviceCredentials(reset_credentials_cb);
   return true;
 }