Pass JavaRef to WebContents::FromJavaWebContents.

chrome/browser/android/tab_state.cc

Index: chrome/browser/android/tab_state.cc
diff --git a/chrome/browser/android/tab_state.cc b/chrome/browser/android/tab_state.cc
index d8cc808cb72afe69ee2abf03ee572fc6b578ff92..1a1c71a7ec2a82403f33473d7328b90e6166b4bd 100644
--- a/chrome/browser/android/tab_state.cc
+++ b/chrome/browser/android/tab_state.cc
@@ -571,9 +571,8 @@ static void CreateHistoricalTab(JNIEnv* env,
                                 const JavaParamRef<jobject>& state,
                                 jint saved_state_version) {
   std::unique_ptr<WebContents> web_contents(WebContents::FromJavaWebContents(
-      WebContentsState::RestoreContentsFromByteBuffer(env, clazz, state,
-                                                      saved_state_version, true)
-          .obj()));
+      WebContentsState::RestoreContentsFromByteBuffer(
+          env, clazz, state, saved_state_version, true)));
   if (web_contents.get())
     TabAndroid::CreateHistoricalTabFromContents(web_contents.get());
 }