WIP add code to check http headers for origin trial tokens

content/common/origin_trials/trial_token_validator.h

Index: content/common/origin_trials/trial_token_validator.h
diff --git a/content/common/origin_trials/trial_token_validator.h b/content/common/origin_trials/trial_token_validator.h
index d19c112169dcbfc1d32cb533a20682915d7752a5..1194b60c54d08e264858ef63c000cb6360714657 100644
--- a/content/common/origin_trials/trial_token_validator.h
+++ b/content/common/origin_trials/trial_token_validator.h
@@ -10,6 +10,10 @@
 #include "content/common/content_export.h"
 #include "url/origin.h"
 
+namespace net {
+class URLRequest;
+}
+
 namespace content {
 
 namespace TrialTokenValidator {
@@ -19,6 +23,9 @@ CONTENT_EXPORT bool ValidateToken(const std::string& token,
                                   const url::Origin& origin,
                                   base::StringPiece featureName);
 
+CONTENT_EXPORT bool RequestEnablesFeature(const net::URLRequest* request,
+                                          base::StringPiece featureName);
+
 }  // namespace TrialTokenValidator
 
 }  // namespace content