Add proper lock to the dropbox throttling map am: 3862660d am: 6ac43358...

        }

    }

    private volatile ArrayMap<String, long[]> mErrorClusterRecords = new ArrayMap<>();

    private final ArrayMap<String, long[]> mErrorClusterRecords = new ArrayMap<>();

    /**

     * Write a description of an error (crash, WTF, ANR) to the drop box.

        // Rate-limit how often we're willing to do the heavy lifting below to

        // collect and record logs; currently 5 logs per 10 second period per eventType.

        final long now = SystemClock.elapsedRealtime();

        synchronized (mErrorClusterRecords) {

            long[] errRecord = mErrorClusterRecords.get(eventType);

            if (errRecord == null) {

                errRecord = new long[2]; // [0]: startTime, [1]: count

            } else {

                if (errRecord[1]++ >= 5) return;

            }

        }

        final StringBuilder sb = new StringBuilder(1024);

        appendDropBoxProcessHeaders(process, processName, sb);