Move PageLoadTiming TimeDelta fields to a common header.

chrome/common/page_load_metrics/page_load_timing.cc

Index: chrome/common/page_load_metrics/page_load_timing.cc
diff --git a/chrome/common/page_load_metrics/page_load_timing.cc b/chrome/common/page_load_metrics/page_load_timing.cc
index 21c3204489a6074d4735cb44d5676af36e648587..e5b13f92e8f3268b0c397625a28bab67538bd4d1 100644
--- a/chrome/common/page_load_metrics/page_load_timing.cc
+++ b/chrome/common/page_load_metrics/page_load_timing.cc
@@ -13,31 +13,24 @@ PageLoadTiming::PageLoadTiming(const PageLoadTiming& other) = default;
 PageLoadTiming::~PageLoadTiming() {}
 
 bool PageLoadTiming::operator==(const PageLoadTiming& other) const {
-  return navigation_start == other.navigation_start &&
-         response_start == other.response_start &&
-         dom_content_loaded_event_start ==
-             other.dom_content_loaded_event_start &&
-         load_event_start == other.load_event_start &&
-         first_layout == other.first_layout &&
-         first_paint == other.first_paint &&
-         first_text_paint == other.first_text_paint &&
-         first_image_paint == other.first_image_paint &&
-         first_contentful_paint == other.first_contentful_paint &&
-         parse_start == other.parse_start && parse_stop == other.parse_stop &&
-         parse_blocked_on_script_load_duration ==
-             other.parse_blocked_on_script_load_duration &&
-         parse_blocked_on_script_load_from_document_write_duration ==
-             other.parse_blocked_on_script_load_from_document_write_duration;
+#define PAGE_LOAD_TIMING_TIME_DELTA_FIELD(field_name) \
+  &&field_name == other.field_name
+
+  return navigation_start == other.navigation_start
+#include "chrome/common/page_load_metrics/page_load_timing_fields.h"
+      ;
+
+#undef PAGE_LOAD_TIMING_TIME_DELTA_FIELD
 }
 
 bool PageLoadTiming::IsEmpty() const {
-  return navigation_start.is_null() && !response_start &&
-         !dom_content_loaded_event_start && !load_event_start &&
-         !first_layout && !first_paint && !first_text_paint &&
-         !first_image_paint && !first_contentful_paint && !parse_start &&
-         !parse_stop && !parse_blocked_on_script_load_duration &&
-         !parse_blocked_on_script_load_from_document_write_duration;
-}
+#define PAGE_LOAD_TIMING_TIME_DELTA_FIELD(field_name) &&!field_name
+
+  return navigation_start.is_null()
+#include "chrome/common/page_load_metrics/page_load_timing_fields.h"
+      ;
+
+#undef PAGE_LOAD_TIMING_TIME_DELTA_FIELD
 
 PageLoadMetadata::PageLoadMetadata() {}