[Offline Pages] Fix flaky test due to actual loading of database.

chrome/test/base/testing_profile.cc

Index: chrome/test/base/testing_profile.cc
diff --git a/chrome/test/base/testing_profile.cc b/chrome/test/base/testing_profile.cc
index 90bab6b3f4592402c216e505f624fc4d430ebc44..c53e0c10e8b2c4068a94a778af819b2fca9df99a 100644
--- a/chrome/test/base/testing_profile.cc
+++ b/chrome/test/base/testing_profile.cc
@@ -49,6 +49,7 @@
 #include "chrome/browser/web_data_service_factory.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
+#include "chrome/common/features.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "components/autofill/core/browser/webdata/autofill_webdata_service.h"
@@ -124,6 +125,10 @@
 #include "chrome/browser/supervised_user/supervised_user_settings_service_factory.h"
 #endif
 
+#if BUILDFLAG(ANDROID_JAVA_UI)
+#include "chrome/browser/android/offline_pages/offline_page_model_factory.h"
+#endif
+
 using base::Time;
 using bookmarks::BookmarkModel;
 using content::BrowserThread;
@@ -610,6 +615,10 @@ void TestingProfile::CreateBookmarkModel(bool delete_file) {
     base::FilePath path = GetPath().Append(bookmarks::kBookmarksFileName);
     base::DeleteFile(path, false);
   }
+#if BUILDFLAG(ANDROID_JAVA_UI)
+  offline_pages::OfflinePageModelFactory::GetInstance()->SetTestingFactory(
+      this, offline_pages::OfflinePageModelFactory::GetMockFactory());
+#endif
   ManagedBookmarkServiceFactory::GetInstance()->SetTestingFactory(
       this, ManagedBookmarkServiceFactory::GetDefaultFactory());
   // This creates the BookmarkModel.