ThumbnailMigration  364 chrome/browser/history/history_types.cc ThumbnailMigration::ThumbnailMigration() {}
ThumbnailMigration  366 chrome/browser/history/history_types.cc ThumbnailMigration::~ThumbnailMigration() {}
ThumbnailMigration  628 chrome/browser/history/history_types.h struct ThumbnailMigration {