Adding support for forced URLs to TopSites.

chrome/browser/history/top_sites_database.cc

 // Copyright (c) 2012 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 "base/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/history/history_types.h"
 #include "chrome/browser/history/top_sites.h"
@@ skipping 294 matching lines @@
   sql::Transaction transaction(db_.get());
   transaction.Begin();
   UpdatePageRankNoTransaction(url, new_rank);
   transaction.Commit();
 }
 
 // Caller should have a transaction open.
 void TopSitesDatabase::UpdatePageRankNoTransaction(
     const MostVisitedURL& url, int new_rank) {
   DCHECK_GT(db_->transaction_nesting(), 0);
+  DCHECK((url.last_forced_time.is_null()) == (new_rank != kRankOfForcedURL))
+      << "Thumbnail without a forced time stamp has a forced rank, or the "
+      << "opposite.";
 
   int prev_rank = GetURLRank(url);
   if (prev_rank == kRankOfNonExistingURL) {
     LOG(WARNING) << "Updating rank of an unknown URL: " << url.url.spec();
     return;
   }
 
   // Shift the ranks.
   if (prev_rank > new_rank) {
     if (new_rank == kRankOfForcedURL) {
@@ skipping 134 matching lines @@
 
   if (!db->Open(db_name)) {
     LOG(ERROR) << db->GetErrorMessage();
     return NULL;
   }
 
   return db.release();
 }
 
 }  // namespace history