[fuchsia] Complete migration to zx_clock_get

zx_clock_get and zx_clock_get_new are now the same. We can complete the
migration back to zx_clock_get.

Change-Id: I6979242eb24c5d29cff002dde7b228043c1d87f2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/107305
Auto-Submit: Adam Barth <abarth@google.com>
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Zach Anderson <zra@google.com>
diff --git a/runtime/vm/os_fuchsia.cc b/runtime/vm/os_fuchsia.cc
index 517f3c4..efde807 100644
--- a/runtime/vm/os_fuchsia.cc
+++ b/runtime/vm/os_fuchsia.cc
@@ -90,7 +90,7 @@
 int OS::GetLocalTimeZoneAdjustmentInSeconds() {
   int32_t local_offset, dst_offset;
   zx_time_t now = 0;
-  zx_clock_get_new(ZX_CLOCK_UTC, &now);
+  zx_clock_get(ZX_CLOCK_UTC, &now);
   zx_status_t status = GetLocalAndDstOffsetInSeconds(
       now / ZX_SEC(1), &local_offset, &dst_offset);
   return status == ZX_OK ? local_offset : 0;
@@ -102,7 +102,7 @@
 
 int64_t OS::GetCurrentTimeMicros() {
   zx_time_t now = 0;
-  zx_clock_get_new(ZX_CLOCK_UTC, &now);
+  zx_clock_get(ZX_CLOCK_UTC, &now);
   return now / kNanosecondsPerMicrosecond;
 }
 
@@ -122,7 +122,7 @@
 
 int64_t OS::GetCurrentThreadCPUMicros() {
   zx_time_t now = 0;
-  zx_clock_get_new(ZX_CLOCK_THREAD, &now);
+  zx_clock_get(ZX_CLOCK_THREAD, &now);
   return now / kNanosecondsPerMicrosecond;
 }