Retain platform-specific timestamp field that are being added in bug 1961012.

Author: mstange

src/profile-logic/process-profile.js

@@ -1697,6 +1697,12 @@ export function processGeckoProfile(geckoProfile: GeckoProfile): Profile {
   const meta: ProfileMeta = {
     interval: geckoProfile.meta.interval,
     startTime: geckoProfile.meta.startTime,
+    startTimeAsClockMonotonicNanosecondsSinceBoot:
+      geckoProfile.meta.startTimeAsClockMonotonicNanosecondsSinceBoot,
+    startTimeAsMachAbsoluteTimeNanoseconds:
+      geckoProfile.meta.startTimeAsMachAbsoluteTimeNanoseconds,
+    startTimeAsQueryPerformanceCounterValue:
+      geckoProfile.meta.startTimeAsQueryPerformanceCounterValue,
     abi: geckoProfile.meta.abi,
     extensions: extensions,
     misc: geckoProfile.meta.misc,

src/types/gecko-profile.js

@@ -405,6 +405,9 @@ export type GeckoProfileShortMeta = {|
   // When the main process started. Timestamp expressed in milliseconds since
   // midnight January 1, 1970 GMT.
   startTime: Milliseconds,
+  startTimeAsClockMonotonicNanosecondsSinceBoot?: number,
+  startTimeAsMachAbsoluteTimeNanoseconds?: number,
+  startTimeAsQueryPerformanceCounterValue?: number,
   shutdownTime: Milliseconds | null,
   categories: CategoryList,
   markerSchema: GeckoMetaMarkerSchema[],

src/types/profile.js

@@ -768,6 +768,9 @@ export type ProfileMeta = {|
   // When the main process started. Timestamp expressed in milliseconds since
   // midnight January 1, 1970 GMT.
   startTime: Milliseconds,
+  startTimeAsClockMonotonicNanosecondsSinceBoot?: number,
+  startTimeAsMachAbsoluteTimeNanoseconds?: number,
+  startTimeAsQueryPerformanceCounterValue?: number,
   // The number of milliseconds since midnight January 1, 1970 GMT.
   endTime?: Milliseconds,
   // When the recording started (in milliseconds after startTime).