MediaDrm: Only apply Widevine security levels to the Widevine key system.

content/browser/media/android/media_drm_credential_manager.h

Index: content/browser/media/android/media_drm_credential_manager.h
diff --git a/content/browser/media/android/media_drm_credential_manager.h b/content/browser/media/android/media_drm_credential_manager.h
index f2cb0fa1fe7c42cd7064b7abb5268dafeab6bf38..cf16cea9528f3edcfe53cdf747bea8668c86d6a0 100644
--- a/content/browser/media/android/media_drm_credential_manager.h
+++ b/content/browser/media/android/media_drm_credential_manager.h
@@ -22,6 +22,10 @@ class MediaDrmCredentialManager {
   typedef base::Callback<void(bool)> ResetCredentialsCB;
 
   // Called to reset the DRM credentials. (for Java)
+  // Only clears credentials for Widevine.
+  // TODO(ddorwin): This should accept a key system parameter so that this is
+  // clear to the caller, which can call it repeatedly as necessary.
+  // http://crbug.com/459400
   static void ResetCredentials(JNIEnv* env, jclass clazz, jobject callback);
 
   // Called to reset the DRM credentials. The result is returned in the