Pass JavaRef to Java methods in android_webview.

android_webview/native/aw_contents_background_thread_client.h

Index: android_webview/native/aw_contents_background_thread_client.h
diff --git a/android_webview/native/aw_contents_background_thread_client.h b/android_webview/native/aw_contents_background_thread_client.h
index 88939e11114e01334431902075a976621a0cb2d3..d08cea195d602b951d2ce89963efbf2813e60b2b 100644
--- a/android_webview/native/aw_contents_background_thread_client.h
+++ b/android_webview/native/aw_contents_background_thread_client.h
@@ -13,13 +13,13 @@ class AwContentsBackgroundThreadClient {
  public:
   static base::android::ScopedJavaLocalRef<jobject> shouldInterceptRequest(
       JNIEnv* env,
-      jobject obj,
-      jstring url,
+      const base::android::JavaRef<jobject>& obj,
+      const base::android::JavaRef<jstring>& url,
       jboolean isMainFrame,
       jboolean hasUserGesture,
-      jstring method,
-      jobjectArray requestHeaderNames,
-      jobjectArray requestHeaderValues);
+      const base::android::JavaRef<jstring>& method,
+      const base::android::JavaRef<jobjectArray>& requestHeaderNames,
+      const base::android::JavaRef<jobjectArray>& requestHeaderValues);
 };
 
 }