Code: Segment::Segment(IMkvReader* pReader, long long elem_start,
 long long start, long long size)
 : m_pReader(pReader),
      m_element_start(elem_start),
      m_start(start),
      m_size(size),
      m_pos(start),
      m_pUnknownSize(0),
      m_pSeekHead(NULL),
      m_pInfo(NULL),

       m_pTracks(NULL),
       m_pCues(NULL),
       m_pChapters(NULL),
       m_clusters(NULL),
       m_clusterCount(0),
       m_clusterPreloadCount(0),
      m_clusterSize(0) {}

Vulnerability Type: DoS Exec Code Mem. Corr. 
CWE ID: CWE-20
Summary: libvpx in libwebm in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-06-01 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted mkv file, aka internal bug 23167726.
Commit Message: external/libvpx/libwebm: Update snapshot

Update libwebm snapshot. This update contains security fixes from upstream.

Upstream git hash: 229f49347d19b0ca0941e072b199a242ef6c5f2b

BUG=23167726

Change-Id: Id3e140e7b31ae11294724b1ecfe2e9c83b4d4207
(cherry picked from commit d0281a15b3c6bd91756e453cc9398c5ef412d99a)
