Add support for zero-padded strings to WebMParser.

media/webm/webm_parser.cc

Index: media/webm/webm_parser.cc
diff --git a/media/webm/webm_parser.cc b/media/webm/webm_parser.cc
index 9952efa58c701d80814a0bb0ab8f57e84d9cff3f..fd5571e765c1bdbd0a5a265858002a853fcbbd95 100644
--- a/media/webm/webm_parser.cc
+++ b/media/webm/webm_parser.cc
@@ -599,7 +599,8 @@ static int ParseBinary(const uint8* buf, int size, int id,
 
 static int ParseString(const uint8* buf, int size, int id,
                        WebMParserClient* client) {
-  std::string str(reinterpret_cast<const char*>(buf), size);
+  int length = strnlen(reinterpret_cast<const char*>(buf), size);

[scherkus (not reviewing), 2013/04/16 21:01:00]

fyi compile failure on mac

../../media/webm/webm_parser.cc:602:16: error: use of undeclared identifier
'strnlen'
  int length = strnlen(reinterpret_cast<const char*>(buf), size);
               ^

+  std::string str(reinterpret_cast<const char*>(buf), length);
   return client->OnString(id, str) ? size : -1;
 }