Cleanup usage of history namespace in components/history

components/history/core/browser/thumbnail_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 "components/history/core/browser/thumbnail_database.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 11 matching lines @@
 #include "components/history/core/browser/url_database.h"
 #include "sql/recovery.h"
 #include "sql/statement.h"
 #include "sql/transaction.h"
 #include "third_party/sqlite/sqlite3.h"
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 #include "base/mac/mac_util.h"
 #endif
 
+namespace history {
+
 // Description of database tables:
 //
 // icon_mapping
 //   id               Unique ID.
 //   page_url         Page URL which has one or more associated favicons.
 //   icon_id          The ID of favicon that this mapping maps to.
 //
 // favicons           This table associates a row to each favicon for a
 //                    |page_url| in the |icon_mapping| table. This is the
 //                    default favicon |page_url|/favicon.ico plus any favicons
@@ skipping 519 matching lines @@
     RecoverDatabaseOrRaze(db, db_path);
   }
 
   // The default handling is to assert on debug and to ignore on release.
   if (!sql::Connection::ShouldIgnoreSqliteError(extended_error))
     DLOG(FATAL) << db->GetErrorMessage();
 }
 
 }  // namespace
 
-namespace history {
-
 ThumbnailDatabase::IconMappingEnumerator::IconMappingEnumerator() {
 }
 
 ThumbnailDatabase::IconMappingEnumerator::~IconMappingEnumerator() {
 }
 
 bool ThumbnailDatabase::IconMappingEnumerator::GetNextIconMapping(
     IconMapping* icon_mapping) {
   if (!statement_.Step())
     return false;
@@ skipping 730 matching lines @@
   meta_table_.SetVersionNumber(7);
   meta_table_.SetCompatibleVersionNumber(std::min(7, kCompatibleVersionNumber));
   return true;
 }
 
 bool ThumbnailDatabase::IsFaviconDBStructureIncorrect() {
   return !db_.IsSQLValid("SELECT id, url, icon_type FROM favicons");
 }
 
 }  // namespace history