Reland "Increase the test timeout used when waiting for events to be traced"

namespace {

constexpr auto TRACE_TIMEOUT = std::chrono::milliseconds(100);

// Use a larger timeout while waiting for events to be traced, compared to the timeout used while

// waiting to receive events through the input channel. Events are traced from a separate thread,

// which does not have the same high thread priority as the InputDispatcher's thread, so the tracer

// is expected to lag behind the Dispatcher at times.

constexpr auto TRACE_TIMEOUT = std::chrono::seconds(5);

base::ResultError<> error(const std::ostringstream& ss) {

    return base::ResultError(ss.str(), BAD_VALUE);