Fix Firefox bookmarks import.

chrome/common/importer/mock_importer_bridge.cc

Index: chrome/common/importer/mock_importer_bridge.cc
diff --git a/tools/clang/plugins/tests/missing_ctor_ignored_base.cpp b/chrome/common/importer/mock_importer_bridge.cc
similarity index 52%
copy from tools/clang/plugins/tests/missing_ctor_ignored_base.cpp
copy to chrome/common/importer/mock_importer_bridge.cc
index 6c4ddd4fc6c4a27e9721be91971255bd6f8bfd15..63576a99d18f6de6cc761dea93d4831597a8c239 100644
--- a/tools/clang/plugins/tests/missing_ctor_ignored_base.cpp
+++ b/chrome/common/importer/mock_importer_bridge.cc
@@ -2,10 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "missing_ctor_ignored_base.h"
+#include "chrome/common/importer/mock_importer_bridge.h"
 
-int main() {
-  MissingCtorsWithIgnoredBase one;
-  MissingCtorsWithIgnoredGrandBase two;
-  return 0;
-}
+MockImporterBridge::~MockImporterBridge() {}