jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/ui/android/tab_model/tab_model_jni_bridge.cc

Index: chrome/browser/ui/android/tab_model/tab_model_jni_bridge.cc
diff --git a/chrome/browser/ui/android/tab_model/tab_model_jni_bridge.cc b/chrome/browser/ui/android/tab_model/tab_model_jni_bridge.cc
index 2f9000979a0f3cf0a4b5d6a35be16aaf72b26772..1f2fa2d05ad67953f9bcf285abc0ccf1680d08ba 100644
--- a/chrome/browser/ui/android/tab_model/tab_model_jni_bridge.cc
+++ b/chrome/browser/ui/android/tab_model/tab_model_jni_bridge.cc
@@ -158,7 +158,7 @@ inline static base::TimeDelta GetTimeDelta(jlong ms) {
 }
 
 void LogFromCloseMetric(JNIEnv* env,
-                        jclass jcaller,
+                        const JavaParamRef<jclass>& jcaller,
                         jlong ms,
                         jboolean perceived) {
   if (perceived) {
@@ -171,7 +171,7 @@ void LogFromCloseMetric(JNIEnv* env,
 }
 
 void LogFromExitMetric(JNIEnv* env,
-                       jclass jcaller,
+                       const JavaParamRef<jclass>& jcaller,
                        jlong ms,
                        jboolean perceived) {
   if (perceived) {
@@ -184,7 +184,7 @@ void LogFromExitMetric(JNIEnv* env,
 }
 
 void LogFromNewMetric(JNIEnv* env,
-                      jclass jcaller,
+                      const JavaParamRef<jclass>& jcaller,
                       jlong ms,
                       jboolean perceived) {
   if (perceived) {
@@ -197,7 +197,7 @@ void LogFromNewMetric(JNIEnv* env,
 }
 
 void LogFromUserMetric(JNIEnv* env,
-                       jclass jcaller,
+                       const JavaParamRef<jclass>& jcaller,
                        jlong ms,
                        jboolean perceived) {
   if (perceived) {
@@ -217,7 +217,9 @@ bool TabModelJniBridge::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
-static jlong Init(JNIEnv* env, jobject obj, jboolean is_incognito) {
+static jlong Init(JNIEnv* env,
+                  const JavaParamRef<jobject>& obj,
+                  jboolean is_incognito) {
   TabModel* tab_model = new TabModelJniBridge(env, obj, is_incognito);
   return reinterpret_cast<intptr_t>(tab_model);
 }