Showing previews UI for Offline Previews

chrome/browser/android/offline_pages/offline_page_bridge.h

Index: chrome/browser/android/offline_pages/offline_page_bridge.h
diff --git a/chrome/browser/android/offline_pages/offline_page_bridge.h b/chrome/browser/android/offline_pages/offline_page_bridge.h
index c5ba32ae2ca00630fd44a39a4821266a1281e243..c7e0e68199d6c7bd81a6a05ba3c5b697abd53043 100644
--- a/chrome/browser/android/offline_pages/offline_page_bridge.h
+++ b/chrome/browser/android/offline_pages/offline_page_bridge.h
@@ -91,20 +91,25 @@ class OfflinePageBridge : public OfflinePageModel::Observer,
       const base::android::JavaParamRef<jstring>& j_namespace,
       const base::android::JavaParamRef<jstring>& j_client_id);
 
   void SavePageLater(JNIEnv* env,
                      const base::android::JavaParamRef<jobject>& obj,
                      const base::android::JavaParamRef<jstring>& url,
                      const base::android::JavaParamRef<jstring>& j_namespace,
                      const base::android::JavaParamRef<jstring>& j_client_id,
                      jboolean user_requested);
 
+  jboolean IsShowingOfflinePreview(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jobject>& j_web_contents);
+
   base::android::ScopedJavaLocalRef<jstring> GetOfflinePageHeaderForReload(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& j_web_contents);
 
   void GetRequestsInQueue(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jobject>& j_callback_obj);