[Experimental Framework] Move the trial token public key out of content and into the embedder.

content/child/origin_trials/trial_token_validator.cc

 // Copyright 2016 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 "content/child/origin_trials/trial_token_validator.h"
 
 #include "base/time/time.h"
 #include "content/common/origin_trials/trial_token.h"
+#include "content/public/common/content_client.h"
 
 namespace content {
 
 TrialTokenValidator::TrialTokenValidator() {}
 TrialTokenValidator::~TrialTokenValidator() {}
 
 bool TrialTokenValidator::validateToken(const blink::WebString& token,
                                         const blink::WebString& origin,
                                         const blink::WebString& featureName) {
-  scoped_ptr<TrialToken> trialToken = TrialToken::Parse(token.utf8());
-  return trialToken &&
-         trialToken->IsAppropriate(origin.utf8(), featureName.utf8()) &&
-         trialToken->IsValid(base::Time::Now());
+  scoped_ptr<TrialToken> trial_token = TrialToken::Parse(token.utf8());
+
+  ContentClient* content_client = GetContentClient();
+  CHECK(content_client);
+
+  base::StringPiece public_key = content_client->GetOriginTrialPublicKey();
+
+  return !public_key.empty() && trial_token &&
+         trial_token->IsAppropriate(origin.utf8(), featureName.utf8()) &&
+         trial_token->IsValid(base::Time::Now(), public_key);
 }
 
 }  // namespace content