Changing the TimeDeltas in DRPPageLoadTiming to Optional

components/data_reduction_proxy/core/common/data_reduction_proxy_page_load_timing.h

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_page_load_timing.h
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_page_load_timing.h b/components/data_reduction_proxy/core/common/data_reduction_proxy_page_load_timing.h
index d2d8416ac65aa5180d599cd9c722874c7499bced..0d6981b626c9e2981677de6ba745c22b41cc5430 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_page_load_timing.h
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_page_load_timing.h
@@ -1,45 +1,44 @@
 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_DATA_REDUCTION_PROXY_CORE_COMMON_DATA_REDUCTION_PROXY_PAGE_LOAD_TIMING_H
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_COMMON_DATA_REDUCTION_PROXY_PAGE_LOAD_TIMING_H
 
+#include "base/optional.h"
 #include "base/time/time.h"
 
 namespace data_reduction_proxy {
 
 // The timing information that is relevant to the Pageload metrics pingback.
 struct DataReductionProxyPageLoadTiming {
   DataReductionProxyPageLoadTiming(
       const base::Time& navigation_start,
-      const base::TimeDelta& response_start,
-      const base::TimeDelta& load_event_start,
-      const base::TimeDelta& first_image_paint,
-      const base::TimeDelta& first_contentful_paint)
-      : navigation_start(navigation_start),
-        response_start(response_start),
-        load_event_start(load_event_start),
-        first_image_paint(first_image_paint),
-        first_contentful_paint(first_contentful_paint) {}
+      const base::Optional<base::TimeDelta>& response_start,
+      const base::Optional<base::TimeDelta>& load_event_start,
+      const base::Optional<base::TimeDelta>& first_image_paint,
+      const base::Optional<base::TimeDelta>& first_contentful_paint);
+
+  DataReductionProxyPageLoadTiming(
+      const DataReductionProxyPageLoadTiming& other);
 
   // Time that the navigation for the associated page was initiated.
   const base::Time navigation_start;
 
   // All TimeDeltas are relative to navigation_start
 
   // Time that the first byte of the response is received.
-  const base::TimeDelta response_start;
+  const base::Optional<base::TimeDelta> response_start;
 
   // Time immediately before the load event is fired.
-  const base::TimeDelta load_event_start;
+  const base::Optional<base::TimeDelta> load_event_start;
 
   // Time when the first image is painted.
-  const base::TimeDelta first_image_paint;
+  const base::Optional<base::TimeDelta> first_image_paint;
   // Time when the first contentful thing (image, text, etc.) is painted.
-  const base::TimeDelta first_contentful_paint;
+  const base::Optional<base::TimeDelta> first_contentful_paint;
 };
 
 }  // namespace data_reduction_proxy
 
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_COMMON_DATA_REDUCTION_PROXY_PAGE_LOAD_TIMING_H