Pass method parameters as JavaParamRef in android_webview.

android_webview/native/aw_http_auth_handler.h

Index: android_webview/native/aw_http_auth_handler.h
diff --git a/android_webview/native/aw_http_auth_handler.h b/android_webview/native/aw_http_auth_handler.h
index 79b7406ec2c6e4521565214bb618320e4717037c..09f6ed1229abcd617fe42f7d897398bf00feb6fb 100644
--- a/android_webview/native/aw_http_auth_handler.h
+++ b/android_webview/native/aw_http_auth_handler.h
@@ -37,8 +37,11 @@ class AwHttpAuthHandler : public AwHttpAuthHandlerBase {
   // from AwHttpAuthHandler
   bool HandleOnUIThread(content::WebContents* web_contents) override;
 
-  void Proceed(JNIEnv* env, jobject obj, jstring username, jstring password);
-  void Cancel(JNIEnv* env, jobject obj);
+  void Proceed(JNIEnv* env,
+               const base::android::JavaParamRef<jobject>& obj,
+               const base::android::JavaParamRef<jstring>& username,
+               const base::android::JavaParamRef<jstring>& password);
+  void Cancel(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
 
  private:
   scoped_refptr<AwLoginDelegate> login_delegate_;