📰 Show the Sign In promo as a separate card from the section

components/ntp_snippets/remote/ntp_snippets_service.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/ntp_snippets/remote/ntp_snippets_service.h"
 
 #include <algorithm>
 #include <iterator>
 #include <utility>
 
@@ skipping 764 matching lines @@
   std::vector<Category> categories_to_erase;
 
   // Empty the ARTICLES category and remove all others, since they may or may
   // not be personalized.
   for (const auto& item : categories_) {
     Category category = item.first;
 
     ClearCachedSuggestions(category);
     ClearDismissedSuggestionsForDebugging(category);
 
-    if (category == articles_category_) {
-      // Temporarily enter an "explicitly disabled" state, so that any open UIs
-      // will clear the suggestions too.
-      CategoryContent& content = categories_[category];
-      if (content.status != CategoryStatus::CATEGORY_EXPLICITLY_DISABLED) {

[dgn, 2016/09/30 11:35:32]

That removed entirely the section, and made the NTP ignore further updates about
it.

-        CategoryStatus old_category_status = content.status;
-        UpdateCategoryStatus(category,
-                             CategoryStatus::CATEGORY_EXPLICITLY_DISABLED);
-        UpdateCategoryStatus(category, old_category_status);
-      }
-    } else {
-      // Remove other categories entirely; they may or may not reappear.
-      UpdateCategoryStatus(category, CategoryStatus::NOT_PROVIDED);
+    UpdateCategoryStatus(category, CategoryStatus::NOT_PROVIDED);
+
+    // Remove the category entirely; it may or may not reappear.
+    if (category != articles_category_)
       categories_to_erase.push_back(category);
-    }
   }
 
   for (Category category : categories_to_erase) {
     categories_.erase(category);
   }
 }
 
 void NTPSnippetsService::OnSnippetImageFetchedFromDatabase(
     const ImageFetchedCallback& callback,
     const ContentSuggestion::ID& suggestion_id,
@@ skipping 262 matching lines @@
 }
 
 NTPSnippetsService::CategoryContent::CategoryContent() = default;
 NTPSnippetsService::CategoryContent::CategoryContent(CategoryContent&&) =
     default;
 NTPSnippetsService::CategoryContent::~CategoryContent() = default;
 NTPSnippetsService::CategoryContent& NTPSnippetsService::CategoryContent::
 operator=(CategoryContent&&) = default;
 
 }  // namespace ntp_snippets