Teach Background Fetch how to start a new fetch.

content/browser/background_fetch/background_fetch_registration_id.h

Index: content/browser/background_fetch/background_fetch_registration_id.h
diff --git a/content/browser/background_fetch/background_fetch_registration_id.h b/content/browser/background_fetch/background_fetch_registration_id.h
index b47f8f5f8b1fc07cf8bf551a74d9284fbc2f18a3..9a8c00332166e4cc7420fd0407c4ea25d534db01 100644
--- a/content/browser/background_fetch/background_fetch_registration_id.h
+++ b/content/browser/background_fetch/background_fetch_registration_id.h
@@ -8,7 +8,6 @@
 #include <stdint.h>
 #include <string>
 
-#include "base/macros.h"
 #include "content/common/content_export.h"
 #include "url/origin.h"
 
@@ -21,6 +20,7 @@ class CONTENT_EXPORT BackgroundFetchRegistrationId {
   BackgroundFetchRegistrationId(int64_t service_worker_registration_id,
                                 const url::Origin& origin,
                                 const std::string& tag);
+  BackgroundFetchRegistrationId(const BackgroundFetchRegistrationId& other);
   BackgroundFetchRegistrationId(BackgroundFetchRegistrationId&& other);
   ~BackgroundFetchRegistrationId();
 
@@ -42,8 +42,6 @@ class CONTENT_EXPORT BackgroundFetchRegistrationId {
   int64_t service_worker_registration_id_;
   url::Origin origin_;
   std::string tag_;
-
-  DISALLOW_COPY_AND_ASSIGN(BackgroundFetchRegistrationId);
 };
 
 }  // namespace content