Move most importer code to chrome/utility/importer

chrome/browser/importer/external_process_importer_client.cc

Index: chrome/browser/importer/external_process_importer_client.cc
diff --git a/chrome/browser/importer/external_process_importer_client.cc b/chrome/browser/importer/external_process_importer_client.cc
index dd3eeb5d5cec1583576221ab8015a9f0334dbe91..9fc4c59b4333ee62e3d0af8e2b34d87074ee3f30 100644
--- a/chrome/browser/importer/external_process_importer_client.cc
+++ b/chrome/browser/importer/external_process_importer_client.cc
@@ -8,8 +8,8 @@
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/importer/external_process_importer_host.h"
-#include "chrome/browser/importer/firefox_importer_utils.h"
 #include "chrome/browser/importer/in_process_importer_bridge.h"
+#include "chrome/common/importer/firefox_importer_utils.h"
 #include "chrome/common/importer/imported_bookmark_entry.h"
 #include "chrome/common/importer/profile_import_process_messages.h"
 #include "content/public/browser/browser_thread.h"
@@ -168,7 +168,7 @@ void ExternalProcessImporterClient::OnHistoryImportGroup(
                        history_rows_group.end());
   if (history_rows_.size() == total_history_rows_count_)
     bridge_->SetHistoryItems(history_rows_,
-                             static_cast<history::VisitSource>(visit_source));
+                             static_cast<ImporterVisitSource>(visit_source));
 }
 
 void ExternalProcessImporterClient::OnHomePageImportReady(