jni: Forbid inappropriate JNI parameter conversions.

chromecast/browser/android/cast_window_manager.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromecast/browser/android/cast_window_manager.h"
 
 #include <jni.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 37 matching lines @@
 }
 
 // Register native methods
 bool RegisterCastWindowManager(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 void Init(JNIEnv* env,
           const JavaParamRef<jclass>& clazz,
           const JavaParamRef<jobject>& obj) {
-  g_window_manager.Get().Reset(
-      base::android::ScopedJavaLocalRef<jobject>(env, obj));
+  g_window_manager.Get().Reset(obj);
 }
 
 jlong LaunchCastWindow(JNIEnv* env,
                        const JavaParamRef<jclass>& clazz,
                        const JavaParamRef<jstring>& jurl) {
   GURL url(base::android::ConvertJavaStringToUTF8(env, jurl));
   return reinterpret_cast<jlong>(
       CastWindowAndroid::CreateNewWindow(
           CastBrowserProcess::GetInstance()->browser_context(),
           url));
@@ skipping 15 matching lines @@
 void EnableDevTools(JNIEnv* env,
                     const JavaParamRef<jclass>& clazz,
                     jboolean enable) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   CastBrowserProcess::GetInstance()->pref_service()->SetBoolean(
       prefs::kEnableRemoteDebugging, enable);
 }
 
 }  // namespace shell
 }  // namespace chromecast