jni: Pass method parameters as JavaParamRef in remoting.

remoting/client/jni/jni_client.h

Index: remoting/client/jni/jni_client.h
diff --git a/remoting/client/jni/jni_client.h b/remoting/client/jni/jni_client.h
index 56c6bc10773490d387fa069b0e1c392cdd852956..005ec1ca8a74e3586cbe4c1f09d97d4001298881 100644
--- a/remoting/client/jni/jni_client.h
+++ b/remoting/client/jni/jni_client.h
@@ -7,6 +7,7 @@
 
 #include <jni.h>
 
+#include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 
 namespace remoting {
@@ -19,7 +20,7 @@ class JniClient {
   // Register C++ methods exposed to Java using JNI.
   static bool RegisterJni(JNIEnv* env);
 
-  void Destroy(JNIEnv* env, jobject caller);
+  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& caller);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(JniClient);