Support getting and deleting token for Instance ID.

google_apis/gcm/engine/unregistration_request.h

Index: google_apis/gcm/engine/unregistration_request.h
diff --git a/google_apis/gcm/engine/unregistration_request.h b/google_apis/gcm/engine/unregistration_request.h
index c5c0eb5919b915e2672e0c3a4e8bfffe690130b9..c5f005eb8c6455271b3c4a8014345300172e7aee 100644
--- a/google_apis/gcm/engine/unregistration_request.h
+++ b/google_apis/gcm/engine/unregistration_request.h
@@ -57,11 +57,14 @@ class GCM_EXPORT UnregistrationRequest : public net::URLFetcherDelegate {
 
   // Details of the of the Unregistration Request. All parameters are mandatory.
   struct GCM_EXPORT RequestInfo {
-    RequestInfo(uint64 android_id,
-                uint64 security_token,
-                const std::string& app_id);
-    ~RequestInfo();
+    RequestInfo();
+    virtual ~RequestInfo();
 
+    virtual void BuildRequestHeaders(std::string* extra_headers);
+    virtual void BuildRequestBody(std::string* body);
+
+    // Version to pass.
+    std::string chrome_version;
     // Android ID of the device.
     uint64 android_id;
     // Security token of the device.
@@ -70,12 +73,34 @@ class GCM_EXPORT UnregistrationRequest : public net::URLFetcherDelegate {
     std::string app_id;
   };
 
+  // GCM registration request.
+  struct GCM_EXPORT GCMRequestInfo : public RequestInfo {
+    GCMRequestInfo();
+    ~GCMRequestInfo() override;
+
+    // RequestInfo overrides:
+    void BuildRequestBody(std::string* body) override;
+  };
+
+  // Instance ID token request.
+  struct GCM_EXPORT InstanceIDRequestInfo : public RequestInfo {
+    InstanceIDRequestInfo();
+    ~InstanceIDRequestInfo() override;
+
+    // RequestInfo overrides:
+    void BuildRequestBody(std::string* body) override;
+
+    std::string instance_id;
+    std::string authorized_entity;
+    std::string scope;
+  };
+
   // Creates an instance of UnregistrationRequest. |callback| will be called
   // once registration has been revoked or there has been an error that makes
   // further retries pointless.
   UnregistrationRequest(
       const GURL& registration_url,
-      const RequestInfo& request_info,
+      scoped_ptr<RequestInfo> request_info,
       const net::BackoffEntry::Policy& backoff_policy,
       const UnregistrationCallback& callback,
       scoped_refptr<net::URLRequestContextGetter> request_context_getter,
@@ -94,7 +119,7 @@ class GCM_EXPORT UnregistrationRequest : public net::URLFetcherDelegate {
   void RetryWithBackoff(bool update_backoff);
 
   UnregistrationCallback callback_;
-  RequestInfo request_info_;
+  scoped_ptr<RequestInfo> request_info_;
   GURL registration_url_;
 
   net::BackoffEntry backoff_entry_;