RETRY_HISTOGRAM   440 chrome/browser/extensions/updater/extension_downloader.cc     RETRY_HISTOGRAM("ManifestFetchSuccess",
RETRY_HISTOGRAM   457 chrome/browser/extensions/updater/extension_downloader.cc       RETRY_HISTOGRAM("ManifestFetchFailure",
RETRY_HISTOGRAM   694 chrome/browser/extensions/updater/extension_downloader.cc     RETRY_HISTOGRAM("CrxFetchSuccess",
RETRY_HISTOGRAM   727 chrome/browser/extensions/updater/extension_downloader.cc       RETRY_HISTOGRAM("CrxFetchFailure",