Revert "Remove custom SkSort algorithms."

This reverts commit 70474c1cb0bc19a025ee678161b633cf57b0a83e.

Reason for revert: bot build failure

Original change's description:
> Remove custom SkSort algorithms.
> 
> SortBench shows that SkTQSort and SkTHeapSort are inferior to std::sort.
> The difference is small on randomized inputs, but quite significant for
> semi-ordered inputs (forward/backward/repeated). There doesn't seem to
> to be any compelling advantage to SkTQSort.
> 
> Nanobench results: https://screenshot.googleplex.com/9JOLV1d6Z0u
> 
> (These performance numbers are from an optimized build my local machine;
> it's possible that we might see different results on the test bots.)
> 
> Change-Id: Iaf19563041547eae7de2953be249129108f093b1
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/302295
> Commit-Queue: John Stiles <johnstiles@google.com>
> Reviewed-by: Mike Klein <mtklein@google.com>

TBR=mtklein@google.com,brianosman@google.com,johnstiles@google.com

Change-Id: I1126dd4cda95716dac225ad32d5b0e5cf3f09421
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/302447
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
diff --git a/tests/PathOpsTestCommon.cpp b/tests/PathOpsTestCommon.cpp
index ef75aab..a8106d0 100644
--- a/tests/PathOpsTestCommon.cpp
+++ b/tests/PathOpsTestCommon.cpp
@@ -5,6 +5,7 @@
  * found in the LICENSE file.
  */
 #include "src/core/SkPathPriv.h"
+#include "src/core/SkTSort.h"
 #include "src/pathops/SkPathOpsBounds.h"
 #include "src/pathops/SkPathOpsConic.h"
 #include "src/pathops/SkPathOpsCubic.h"
@@ -76,7 +77,7 @@
         inflections += cubic->findMaxCurvature(&inflectT[inflections]);
         SkASSERT(inflections <= 5);
     }
-    std::sort(inflectT, inflectT + inflections);
+    SkTQSort<double>(inflectT, &inflectT[inflections - 1]);
     // OPTIMIZATION: is this filtering common enough that it needs to be pulled out into its
     // own subroutine?
     while (inflections && approximately_less_than_zero(inflectT[0])) {