Make Foreign Fetch an origin trial.

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 ec74e9ac5ae26c3433eef76b2040e17681cb5a6e..1997985cb4e4cc013324748b94997c25562c6c79 100644
--- a/content/common/origin_trials/trial_token_validator.h
+++ b/content/common/origin_trials/trial_token_validator.h
@@ -14,6 +14,11 @@ namespace blink {
 enum class WebOriginTrialTokenStatus;
 }
 
+namespace net {
+class HttpResponseHeaders;
+class URLRequest;
+}
+
 namespace content {
 
 namespace TrialTokenValidator {
@@ -26,6 +31,14 @@ CONTENT_EXPORT blink::WebOriginTrialTokenStatus ValidateToken(
     const url::Origin& origin,
     std::string* feature_name);
 
+CONTENT_EXPORT bool RequestEnablesFeature(const net::URLRequest* request,
+                                          base::StringPiece feature_name);
+
+CONTENT_EXPORT bool RequestEnablesFeature(
+    const GURL& request_url,
+    const net::HttpResponseHeaders* response_headers,
+    base::StringPiece feature_name);
+
 }  // namespace TrialTokenValidator
 
 }  // namespace content