Increase "log too large" threshold in MetricsService.

Current value is at 50k, which is actually the average log
size on a lot of platforms. Increase it to 100k for a more
reasonable default that should cover the majority of cases
where logs are discarded due to this size limit according
to UMA data.

BUG=380282

Review URL: https://codereview.chromium.org/313613003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278612 0039d316-1c4b-4281-b951-d872f2087c98

components/metrics/metrics_service.cc

@@ -222,7 +222,7 @@ const int kEventLimit = 2400;
 // will discard the log, and not try to retransmit it.  We also don't persist
 // the log to the prefs for transmission during the next chrome session if this
 // limit is exceeded.
-const size_t kUploadLogAvoidRetransmitSize = 50000;
+const size_t kUploadLogAvoidRetransmitSize = 100 * 1024;
 
 // Interval, in minutes, between state saves.
 const int kSaveStateIntervalMinutes = 5;