Allow DRM plugins to be destroyed when released

bug: 13411994
Change-Id: I5b4ac137ebfbaa61bc37f8344ab6ff3a7f6c0099
diff --git a/media/jni/android_media_MediaDrm.cpp b/media/jni/android_media_MediaDrm.cpp
index 7c45682..4fbd2a4 100644
--- a/media/jni/android_media_MediaDrm.cpp
+++ b/media/jni/android_media_MediaDrm.cpp
@@ -297,8 +297,6 @@
 }
 
 JDrm::~JDrm() {
-    mDrm.clear();
-
     JNIEnv *env = AndroidRuntime::getJNIEnv();
 
     env->DeleteWeakGlobalRef(mObject);
@@ -363,6 +361,13 @@
     }
 }
 
+void JDrm::disconnect() {
+    if (mDrm != NULL) {
+        mDrm->destroyPlugin();
+        mDrm.clear();
+    }
+}
+
 
 // static
 bool JDrm::IsCryptoSchemeSupported(const uint8_t uuid[16], const String8 &mimeType) {
@@ -527,6 +532,7 @@
     sp<JDrm> drm = setDrm(env, thiz, NULL);
     if (drm != NULL) {
         drm->setListener(NULL);
+        drm->disconnect();
     }
 }
 
diff --git a/media/jni/android_media_MediaDrm.h b/media/jni/android_media_MediaDrm.h
index 620ad28..b7b8e5d 100644
--- a/media/jni/android_media_MediaDrm.h
+++ b/media/jni/android_media_MediaDrm.h
@@ -47,6 +47,8 @@
     void notify(DrmPlugin::EventType, int extra, const Parcel *obj);
     status_t setListener(const sp<DrmListener>& listener);
 
+    void disconnect();
+
 protected:
     virtual ~JDrm();