Revert of SkThreadPool ~~> SkTaskGroup

tests/PathOpsOpCubicThreadedTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "PathOpsExtendedTest.h"
 #include "PathOpsThreadedCommon.h"
 
 static void testOpCubicsMain(PathOpsThreadState* data) {
@@ skipping 49 matching lines @@
         }
     }
                     }
                 }
             }
         }
     }
 }
 
 DEF_TEST(PathOpsOpCubicsThreaded, reporter) {
-    initializeTests(reporter, "cubicOp");
-    PathOpsThreadedTestRunner testRunner(reporter);
+    int threadCount = initializeTests(reporter, "cubicOp");
+    PathOpsThreadedTestRunner testRunner(reporter, threadCount);
     for (int a = 0; a < 6; ++a) {  // outermost
         for (int b = a + 1; b < 7; ++b) {
             for (int c = 0 ; c < 6; ++c) {
                 for (int d = c + 1; d < 7; ++d) {
                     *testRunner.fRunnables.append() = SkNEW_ARGS(PathOpsThreadedRunnable,
                             (&testOpCubicsMain, a, b, c, d, &testRunner));
                 }
             }
             if (!reporter->allowExtendedTest()) goto finish;
         }
     }
 finish:
     testRunner.render();
     ShowTestArray();
 }