Add HTTP certificate report URL with Finch gate

chrome/browser/net/certificate_error_reporter.h

Index: chrome/browser/net/certificate_error_reporter.h
diff --git a/chrome/browser/net/certificate_error_reporter.h b/chrome/browser/net/certificate_error_reporter.h
index 6b60ef850be2fdf66988e36a6b0ef7078bc74355..88c39156a4151b42c336dd59fefdcfa38e36409e 100644
--- a/chrome/browser/net/certificate_error_reporter.h
+++ b/chrome/browser/net/certificate_error_reporter.h
@@ -22,6 +22,11 @@ namespace chrome_browser_net {
 
 class EncryptedCertLoggerRequest;
 
+// Constants for the Finch trial that controls whether the
+// CertificateErrorReporter supports HTTP uploads.
+extern const char kHttpCertificateUploadExperiment[];
+extern const char kHttpCertificateUploadGroup[];
+
 // Provides functionality for sending reports about invalid SSL
 // certificate chains to a report collection server.
 class CertificateErrorReporter : public net::URLRequest::Delegate {