Cut down on usage of deprecated APIs in //crypto.

net/spdy/spdy_test_util_common.cc

 // Copyright (c) 2013 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.
 
 #include "net/spdy/spdy_test_util_common.h"
 
 #include <stdint.h>
 #include <cstddef>
 #include <utility>
 
@@ skipping 274 matching lines @@
 }
 
 MockECSignatureCreator::MockECSignatureCreator(crypto::ECPrivateKey* key)
     : key_(key) {
 }
 
 bool MockECSignatureCreator::Sign(const uint8_t* data,
                                   int data_len,
                                   std::vector<uint8_t>* signature) {
   std::vector<uint8_t> private_key_value;
-  key_->ExportValue(&private_key_value);
+  if (!key_->ExportValueForTesting(&private_key_value))
+    return false;
   std::string head = "fakesignature";
   std::string tail = "/fakesignature";
 
   signature->clear();
   signature->insert(signature->end(), head.begin(), head.end());
   signature->insert(signature->end(), private_key_value.begin(),
                     private_key_value.end());
   signature->insert(signature->end(), '-');
   signature->insert(signature->end(), data, data + data_len);
   signature->insert(signature->end(), tail.begin(), tail.end());
@@ skipping 962 matching lines @@
   }
 }
 
 void SpdyTestUtil::SetPriority(RequestPriority priority,
                                SpdySynStreamIR* ir) const {
   ir->set_priority(ConvertRequestPriorityToSpdyPriority(
       priority, spdy_version()));
 }
 
 }  // namespace net