GetPreferredExtensionForMimeType  737 net/base/mime_util.cc bool GetPreferredExtensionForMimeType(const std::string& mime_type,
GetPreferredExtensionForMimeType   77 net/base/platform_mime_util_linux.cc bool PlatformMimeUtil::GetPreferredExtensionForMimeType(
GetPreferredExtensionForMimeType   28 net/base/platform_mime_util_win.cc bool PlatformMimeUtil::GetPreferredExtensionForMimeType(