Merge "Add uncached argument to BacktraceMap::Create on darwin"

#if defined(__APPLE__)

// Corkscrew and libunwind don't compile on the mac, so create a generic

// map object.

BacktraceMap* BacktraceMap::Create(pid_t pid) {

BacktraceMap* BacktraceMap::Create(pid_t pid, bool uncached) {

  BacktraceMap* map = new BacktraceMap(pid);

  if (!map->Build()) {

    delete map;