Adding OCSP Parser

net/der/parser.h

Index: net/der/parser.h
diff --git a/net/der/parser.h b/net/der/parser.h
index 2192371d6c62890aea9426acb052d61071100033..6274ebe8818fb74c03ca06470cb61afda0203c15 100644
--- a/net/der/parser.h
+++ b/net/der/parser.h
@@ -19,6 +19,7 @@ namespace net {
 namespace der {
 
 class BitString;
+struct GeneralizedTime;
 
 // Parses a DER-encoded ASN.1 structure. DER (distinguished encoding rules)
 // encodes each data value with a tag, length, and value (TLV). The tag
@@ -161,6 +162,12 @@ class NET_EXPORT Parser {
   // input may or may not have been advanced).
   bool ReadBitString(BitString* out) WARN_UNUSED_RESULT;
 
+  // Reads a GeneralizeTime. On success fills |out| and returns true.
+  //
+  // Note that on failure the Parser is left in an undefined state (the
+  // input may or may not have been advanced).
+  bool ReadGeneralizedTime(GeneralizedTime* out) WARN_UNUSED_RESULT;
+
   // Lower level methods. The previous methods couple reading data from the
   // input with advancing the Parser's internal pointer to the next TLV; these
   // lower level methods decouple those two steps into methods that read from