Fix wrong usages of ScopedJavaLocalRef::Release().

content/shell/android/shell_manager.cc

Index: content/shell/android/shell_manager.cc
diff --git a/content/shell/android/shell_manager.cc b/content/shell/android/shell_manager.cc
index 3a22db00917c91d7ac14b9117e88329574878b0b..b262c883eddaf46d56b87dfd5f79dd9ba1f66e2f 100644
--- a/content/shell/android/shell_manager.cc
+++ b/content/shell/android/shell_manager.cc
@@ -31,13 +31,11 @@ base::LazyInstance<GlobalState> g_global_state = LAZY_INSTANCE_INITIALIZER;
 
 namespace content {
 
-jobject CreateShellView(Shell* shell) {
+ScopedJavaLocalRef<jobject> CreateShellView(Shell* shell) {
   JNIEnv* env = base::android::AttachCurrentThread();
   jobject j_shell_manager = g_global_state.Get().j_shell_manager.obj();
-  return Java_ShellManager_createShell(
-      env,
-      j_shell_manager,
-      reinterpret_cast<intptr_t>(shell)).Release();
+  return Java_ShellManager_createShell(env, j_shell_manager,
+                                       reinterpret_cast<intptr_t>(shell));
 }
 
 void RemoveShellView(jobject shell_view) {