Remove unused variable in MediaDrmCredentialManager.java

R=tedchoc@chromium.org

Review URL: https://codereview.chromium.org/185223002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255308 0039d316-1c4b-4281-b951-d872f2087c98

AUTHORS

@@ -123,6 +123,7 @@ Hongbo Min <hongbo.min@intel.com>
 Horia Olaru <horia.olaru@gmail.com>
 Horia Olaru <olaru@adobe.com>
 Hyunki Baik <hyunki.baik@samsung.com>
+Hyungwook Lee <withlhw@gmail.com>
 Ibrar Ahmed <ibrar.ahmad@gmail.com>
 Ion Rosca <rosca@adobe.com>
 J. Ryan Stinnett <jryans@chromium.org>

content/public/android/java/src/org/chromium/content/browser/MediaDrmCredentialManager.java

@@ -12,7 +12,6 @@ import org.chromium.base.JNINamespace;
  */
 @JNINamespace("content")
 public class MediaDrmCredentialManager {
-    private int mNativeMediaDrmCredentialManager;
 
     /**
      * Callback interface for getting notified from credential reset.