Delete SSLStatus.public_key_hashes

This member variable was added by crrev.com/c/659318, to show warning
for legacy Symantec roots from content::SSLManager. But
crrev.com/c/693315 stopped using it.

So this member variable is not used anymore.

Bug: 763984
Change-Id: Iffeb27972171bb0d231be6efd07c31cfcf2d951c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2137199Reviewed-by: Emily Stark <estark@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Tsuyoshi Horo <horo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756911}

content/public/browser/ssl_status.cc

@@ -24,7 +24,6 @@ SSLStatus::SSLStatus(const net::SSLInfo& ssl_info)
     : initialized(true),
       certificate(ssl_info.cert),
       cert_status(ssl_info.cert_status),
-      public_key_hashes(ssl_info.public_key_hashes),
       key_exchange_group(ssl_info.key_exchange_group),
       peer_signature_algorithm(ssl_info.peer_signature_algorithm),
       connection_status(ssl_info.connection_status),
@@ -36,7 +35,6 @@ SSLStatus::SSLStatus(const SSLStatus& other)
     : initialized(other.initialized),
       certificate(other.certificate),
       cert_status(other.cert_status),
-      public_key_hashes(other.public_key_hashes),
       key_exchange_group(other.key_exchange_group),
       peer_signature_algorithm(other.peer_signature_algorithm),
       connection_status(other.connection_status),
@@ -49,7 +47,6 @@ SSLStatus& SSLStatus::operator=(SSLStatus other) {
   initialized = other.initialized;
   certificate = other.certificate;
   cert_status = other.cert_status;
-  public_key_hashes = other.public_key_hashes;
   key_exchange_group = other.key_exchange_group;
   peer_signature_algorithm = other.peer_signature_algorithm;
   connection_status = other.connection_status;

content/public/browser/ssl_status.h

@@ -70,10 +70,6 @@ struct CONTENT_EXPORT SSLStatus {
   bool initialized;
   scoped_refptr<net::X509Certificate> certificate;
   net::CertStatus cert_status;
-  // The hashes of the SubjectPublicKeyInfos from each certificate in
-  // |certificate|. This field is not necessarily populated, e.g. for responses
-  // served from disk cache.
-  net::HashValueVector public_key_hashes;
   uint16_t key_exchange_group;
   uint16_t peer_signature_algorithm;
   int connection_status;