Fortify against corrupted font.

BUG=92270
TEST=none


Review URL: http://codereview.chromium.org/7610005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96362 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -21,7 +21,7 @@ vars = {
   "libjingle_revision": "77",
   "libvpx_revision": "90416",
   "ffmpeg_revision": "96257",
-  "sfntly_revision": "36",
+  "sfntly_revision": "43",
   "skia_revision": "2088",
   "v8_revision": "8765",
   "webrtc_revision": "242",

third_party/sfntly/src/subsetter/subsetter_impl.cc

@@ -154,6 +154,9 @@ bool SubsetterImpl::HasName(const char* font_name, Font* font) {
   typedef std::map<int32_t, UnicodeString> NameMap;
   NameMap names;
   NameTablePtr name_table = down_cast<NameTable*>(font->GetTable(Tag::name));
+  if (name_table == NULL) {
+    return false;
+  }
 
   for (int32_t i = 0; i < name_table->NameCount(); ++i) {
     switch(name_table->NameId(i)) {