Revert "Remove deprecated TimeDelta functions."

This reverts commit 15de2eb.

Reason for revert: Compile error on bot
https://ci.chromium.org/ui/p/chromium/builders/ci/lacros-amd64-generic-binary-size-rel/22120/overview

Original change's description:
> Remove deprecated TimeDelta functions.
>
> Bug: 1243777
> Change-Id: I560511a03b2dbac8104876ea4fad88d697abb515
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3202711
> Owners-Override: Peter Kasting <pkasting@chromium.org>
> Reviewed-by: Peter Boström <pbos@chromium.org>
> Commit-Queue: Peter Kasting <pkasting@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#929500}

Bug: 1243777
Change-Id: Ib90ce44e030da24c05742265039a1444539eea87
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3211762
Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Noel Gordon <noel@chromium.org>
Auto-Submit: Yoichi Osato <yoichio@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Noel Gordon <noel@chromium.org>
Owners-Override: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/main@{#929511}

base/time/time.h

@@ -118,6 +118,24 @@ class BASE_EXPORT TimeDelta {
  public:
   constexpr TimeDelta() = default;
 
+  // Converts units of time to TimeDeltas.
+  // These conversions treat minimum argument values as min type values or -inf,
+  // and maximum ones as max type values or +inf; and their results will produce
+  // an is_min() or is_max() TimeDelta. WARNING: Floating point arithmetic is
+  // such that FromXXXD(t.InXXXF()) may not precisely equal |t|. Hence, floating
+  // point values should not be used for storage.
+  static constexpr TimeDelta FromDays(int64_t days);
+  static constexpr TimeDelta FromHours(int64_t hours);
+  static constexpr TimeDelta FromMinutes(int64_t minutes);
+  static constexpr TimeDelta FromSecondsD(double secs);
+  static constexpr TimeDelta FromSeconds(int64_t secs);
+  static constexpr TimeDelta FromMillisecondsD(double ms);
+  static constexpr TimeDelta FromMilliseconds(int64_t ms);
+  static constexpr TimeDelta FromMicrosecondsD(double us);
+  static constexpr TimeDelta FromMicroseconds(int64_t us);
+  static constexpr TimeDelta FromNanosecondsD(double ns);
+  static constexpr TimeDelta FromNanoseconds(int64_t ns);
+
 #if defined(OS_WIN)
   static TimeDelta FromQPCValue(LONGLONG qpc_value);
   // TODO(crbug.com/989694): Avoid base::TimeDelta factory functions
@@ -134,6 +152,9 @@ class BASE_EXPORT TimeDelta {
   static TimeDelta FromMachTime(uint64_t mach_time);
 #endif  // defined(OS_MAC)
 
+  // Converts a frequency in Hertz (cycles per second) into a period.
+  static constexpr TimeDelta FromHz(double frequency);
+
   // Converts an integer value representing TimeDelta to a class. This is used
   // when deserializing a |TimeDelta| structure, using a value known to be
   // compatible. It is not provided as a constructor because the integer type
@@ -920,6 +941,68 @@ constexpr TimeDelta Hertz(T n) {
       saturated_cast<int64_t>(Time::kMicrosecondsPerSecond / n));
 }
 
+// Deprecated TimeDelta conversion functions, to be replaced by the above.
+
+// static
+constexpr TimeDelta TimeDelta::FromDays(int64_t days) {
+  return Days(days);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromHours(int64_t hours) {
+  return Hours(hours);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromMinutes(int64_t minutes) {
+  return Minutes(minutes);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromSecondsD(double secs) {
+  return Seconds(secs);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromSeconds(int64_t secs) {
+  return Seconds(secs);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromMillisecondsD(double ms) {
+  return Milliseconds(ms);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromMilliseconds(int64_t ms) {
+  return Milliseconds(ms);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromMicrosecondsD(double us) {
+  return Microseconds(us);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromMicroseconds(int64_t us) {
+  return Microseconds(us);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromNanosecondsD(double ns) {
+  return Nanoseconds(ns);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromNanoseconds(int64_t ns) {
+  return Nanoseconds(ns);
+}
+
+// static
+constexpr TimeDelta TimeDelta::FromHz(double frequency) {
+  return Hertz(frequency);
+}
+
 // TimeDelta functions that must appear below the declarations of Time/TimeDelta
 
 constexpr double TimeDelta::ToHz() const {