Move threadpool code from include/utils to tools/threadpool.

tests/PathOpsThreadedCommon.cpp

Index: tests/PathOpsThreadedCommon.cpp
diff --git a/tests/PathOpsThreadedCommon.cpp b/tests/PathOpsThreadedCommon.cpp
index ac4cd6ba62614f7623f0abc6e971c13dd34a0b00..f2735d6ee79ad273d748f8ce7ab9f18c9586ce0d 100644
--- a/tests/PathOpsThreadedCommon.cpp
+++ b/tests/PathOpsThreadedCommon.cpp
@@ -7,7 +7,7 @@
 
 #include "PathOpsExtendedTest.h"
 #include "PathOpsThreadedCommon.h"
-#include "SkThreadPool.h"
+#include "ThreadPool.h"
 
 PathOpsThreadedTestRunner::~PathOpsThreadedTestRunner() {
     for (int index = 0; index < fRunnables.count(); index++) {
@@ -16,7 +16,7 @@ PathOpsThreadedTestRunner::~PathOpsThreadedTestRunner() {
 }
 
 void PathOpsThreadedTestRunner::render() {
-    SkThreadPool pool(fNumThreads);
+    ThreadPool pool(fNumThreads);
     for (int index = 0; index < fRunnables.count(); ++ index) {
         pool.add(fRunnables[index]);
     }