Cathy, please consider this as a good entry level bug for Candice to get started.

@Candice another good starter bug

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3d577dd09adcfe8a2a9e7391c306b55c2e785593

commit 3d577dd09adcfe8a2a9e7391c306b55c2e785593
Author: Candice Sy <cmsy@google.com>
Date: Sat Nov 18 00:26:56 2017

Removed is_loaded() from OfflinePageModel

Clean up because is_loaded() is no longer used. The function was removed from OfflinePageModel and classes that overrode it.

Bug:  784653 
Change-Id: I72f38e5621ba67762d0086d5a1c1cafbb614e6b3
Reviewed-on: https://chromium-review.googlesource.com/772977
Commit-Queue: Candice Sy <cmsy@google.com>
Reviewed-by: Yafei Duan <romax@chromium.org>
Reviewed-by: vitaliii <vitaliii@chromium.org>
Reviewed-by: Cathy Li <chili@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517630}
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/chrome/browser/ntp_snippets/download_suggestions_provider.cc
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/chrome/browser/offline_pages/android/evaluation/offline_page_evaluation_bridge.cc
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/chrome/browser/offline_pages/android/offline_page_bridge.cc
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/chrome/browser/offline_pages/recent_tab_helper_unittest.cc
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/components/ntp_snippets/offline_pages/offline_pages_test_utils.cc
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/components/ntp_snippets/offline_pages/offline_pages_test_utils.h
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/components/offline_pages/core/model/offline_page_model_taskified.cc
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/components/offline_pages/core/model/offline_page_model_taskified.h
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/components/offline_pages/core/offline_page_model.h
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/components/offline_pages/core/offline_page_model_impl.cc
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/components/offline_pages/core/offline_page_model_impl.h
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/components/offline_pages/core/offline_page_model_impl_unittest.cc
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/components/offline_pages/core/stub_offline_page_model.cc
[modify] https://crrev.com/3d577dd09adcfe8a2a9e7391c306b55c2e785593/components/offline_pages/core/stub_offline_page_model.h

This is fixed after the CL landed. Closing as fixed.