Ensure using chrome://thumb2/... adds the URL as a forced URL in TopSites so that a thumbnail is ca…

chrome/browser/history/top_sites_impl.cc

 // Copyright (c) 2013 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 "chrome/browser/history/top_sites_impl.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 589 matching lines @@
     url.redirects.push_back(url.url);
     url.title = l10n_util::GetStringUTF16(kPrepopulatedPages[i].title_id);
   }
   return urls;
 }
 
 bool TopSitesImpl::loaded() const {
   return loaded_;
 }
 
+bool TopSitesImpl::AddForcedURL(const GURL& url, const base::Time& time) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  size_t num_forced = cache_->GetNumForcedURLs();
+  MostVisitedURLList new_list(cache_->top_sites());
+  MostVisitedURL new_url;
+
+  if (cache_->IsKnownURL(url)) {
+    size_t index = cache_->GetURLIndex(url);
+    // Do nothing if we currently have that URL as non-forced.
+    if (new_list[index].last_forced_time.is_null())
+      return false;
+
+    // Update the |last_forced_time| of the already existing URL. Delete it and
+    // reinsert it at the right location.
+    new_url = new_list[index];
+    new_list.erase(new_list.begin() + index);
+    num_forced--;
+  } else {
+    new_url.url = url;
+    new_url.redirects.push_back(url);
+  }
+  new_url.last_forced_time = time;
+  // Add forced URLs and sort. Added to the end of the list of forced URLs
+  // since this is almost always where it needs to go, unless the user's local
+  // clock is fiddled with.
+  MostVisitedURLList::iterator mid = new_list.begin() + num_forced;
+  new_list.insert(mid, new_url);
+  mid = new_list.begin() + num_forced;  // Mid was invalidated.
+  std::inplace_merge(new_list.begin(), mid, mid + 1, ForcedURLComparator);
+  SetTopSites(new_list);
+  return true;
+}
+
 bool TopSitesImpl::AddPrepopulatedPages(MostVisitedURLList* urls,
                                         size_t num_forced_urls) {
   bool added = false;
   MostVisitedURLList prepopulate_urls = GetPrepopulatePages();
   for (size_t i = 0; i < prepopulate_urls.size(); ++i) {
     if (urls->size() - num_forced_urls < kNonForcedTopSitesNumber &&
         IndexOf(*urls, prepopulate_urls[i].url) == -1) {
       urls->push_back(prepopulate_urls[i]);
       added = true;
     }
@@ skipping 283 matching lines @@
   SetTopSites(pages);
 
   // Used only in testing.
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_TOP_SITES_UPDATED,
       content::Source<TopSitesImpl>(this),
       content::Details<CancelableRequestProvider::Handle>(&handle));
 }
 
 }  // namespace history