Remove residual support for SHA-1 public key pins.

net/base/hash_value.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_BASE_HASH_VALUE_H_
 #define NET_BASE_HASH_VALUE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
@@ skipping 25 matching lines @@
 
 inline bool operator==(const SHA256HashValue& lhs, const SHA256HashValue& rhs) {
   return memcmp(lhs.data, rhs.data, sizeof(lhs.data)) == 0;
 }
 
 inline bool operator!=(const SHA256HashValue& lhs, const SHA256HashValue& rhs) {
   return !(lhs == rhs);
 }
 
 enum HashValueTag {
-  HASH_VALUE_SHA1,
   HASH_VALUE_SHA256,
 };
 
 class NET_EXPORT HashValue {
  public:
-  explicit HashValue(const SHA1HashValue& hash);
   explicit HashValue(const SHA256HashValue& hash);
   explicit HashValue(HashValueTag tag) : tag(tag) {}
-  HashValue() : tag(HASH_VALUE_SHA1) {}
+  HashValue() : tag(HASH_VALUE_SHA256) {}
 
   // Serializes/Deserializes hashes in the form of
   // <hash-name>"/"<base64-hash-value>
   // (eg: "sha1/...")
   // This format may be persisted to permanent storage, so
   // care should be taken before changing the serialization.
   //
   // This format is used for:
   //   - net_internals display/setting public-key pins
   //   - logging public-key pins
@@ skipping 49 matching lines @@
 
 // IsSHA256HashInSortedArray returns true iff |hash| is in |array|, a sorted
 // array of SHA256 hashes.
 bool IsSHA256HashInSortedArray(const SHA256HashValue& hash,
                                const uint8_t* array,
                                size_t array_byte_len);
 
 }  // namespace net
 
 #endif  // NET_BASE_HASH_VALUE_H_