Add mime type information to the download database

chrome/browser/history/history_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 "chrome/browser/history/history_database.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/metrics/histogram.h"
 #include "base/rand_util.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "sql/transaction.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/mac_util.h"
 #endif
 
 namespace history {
 
 namespace {
 
 // Current version number. We write databases at the "current" version number,
 // but any previous version that can read the "compatible" one can make do with
 // our database without *too* many bad effects.
-const int kCurrentVersionNumber = 28;
+const int kCurrentVersionNumber = 29;
 const int kCompatibleVersionNumber = 16;
 const char kEarlyExpirationThresholdKey[] = "early_expiration_threshold";
 
 }  // namespace
 
 HistoryDatabase::HistoryDatabase()
     : needs_version_17_migration_(false) {
 }
 
 HistoryDatabase::~HistoryDatabase() {
@@ skipping 384 matching lines @@
 
   if (cur_version == 27) {
     if (!MigrateDownloadValidators()) {
       LOG(WARNING) << "Unable to migrate history to version 28";
       return sql::INIT_FAILURE;
     }
     cur_version++;
     meta_table_.SetVersionNumber(cur_version);
   }
 
+  if (cur_version == 28) {
+    if (!MigrateMimeType()) {
+      LOG(WARNING) << "Unable to migrate history to version 29";
+      return sql::INIT_FAILURE;
+    }
+    cur_version++;
+    meta_table_.SetVersionNumber(cur_version);
+  }
+
   // When the version is too old, we just try to continue anyway, there should
   // not be a released product that makes a database too old for us to handle.
   LOG_IF(WARNING, cur_version < GetCurrentVersion()) <<
          "History database version " << cur_version << " is too old to handle.";
 
   return sql::INIT_OK;
 }
 
 #if !defined(OS_WIN)
 void HistoryDatabase::MigrateTimeEpoch() {
@@ skipping 12 matching lines @@
       "WHERE id IN (SELECT id FROM segment_usage WHERE time_slot > 0);"));
 
   // Erase all the full text index files. These will take a while to update and
   // are less important, so we just blow them away. Same with the archived
   // database.
   needs_version_17_migration_ = true;
 }
 #endif
 
 }  // namespace history