Always initialize |m_totalWidth| in HarfBuzzShaper::shape.

R=leviw@chromium.org
BUG=476647

Review URL: https://codereview.chromium.org/1108663003

git-svn-id: svn://svn.chromium.org/blink/trunk@194541 bbb929c8-8fbe-4397-9dbb-9b2b20218538
inline void HarfBuzzRunCache::remove(CachedShapingResults* node)
{
    CachedShapingResultsLRUNode* lruNode = *node->lru;

    m_harfBuzzRunLRU.erase(node->lru);
    m_harfBuzzRunMap.erase(lruNode->entry);
    delete lruNode;
    delete node;
}

inline void HarfBuzzRunCache::remove(CachedShapingResults* node)
{
    CachedShapingResultsLRUNode* lruNode = *node->lru;

    m_harfBuzzRunLRU.erase(node->lru);
    m_harfBuzzRunMap.erase(lruNode->entry);
    delete lruNode;
    delete node;
}
