Update references to skiaperf.com.

site/dev/tools/skiaperf.md

 Skia Perf
 =========
 
-[Skia Perf](https://skiaperf.com) is a web based interface for exploring
+[Skia Perf](https://perf.skia.org) is a web based interface for exploring
 performance data produced by `nanobench` and the code size bot. The data
 includes:
 
   * The nanobench test times in ms.
   * Total memory consumed during a nanobench run.
   * Code size for various symbol types in bytes.
 
 All of the data can be plotted and also can be [analyzed using k-means
-clustering](https://skiaperf.com/clusters/).
+clustering](https://perf.skia.org/clusters/).
 
 Calculations
 ------------
 
 Skia Perf has the ability to perform calculations over the test data
 allowing you to build up interesting queries.
 
-For example, this query displays the [total code size of the library over time](https://skiaperf.com/#1877):
+For example, this query displays the [total code size of the library over time](https://perf.skia.org/#1877):
 
     sum(fill(filter("config=memory&sub_result=bytes")))
 
-This query displays [the ratio of playback time in ms to the number of ops for desk\_wowwiki.skp](https://skiaperf.com/#1876):
+This query displays [the ratio of playback time in ms to the number of ops for desk\_wowwiki.skp](https://perf.skia.org/#1876):
 
     ratio(
       ave(fill(filter("name=desk_wowwiki.skp&sub_result=min_ms"))),
       ave(fill(filter("name=desk_wowwiki.skp&sub_result=ops")))
     )
 
-You can also use the data to answer questions like [how many tests were run per commit](https://skiaperf.com/#1878).
+You can also use the data to answer questions like [how many tests were run per commit](https://perf.skia.org/#1878).
 
     count(filter(""))
 
-See Skia Perf for the [full list of functions available](https://skiaperf.com/help).
+See Skia Perf for the [full list of functions available](https://perf.skia.org/help).