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

dm/DMQuiltTask.cpp

Index: dm/DMQuiltTask.cpp
diff --git a/dm/DMQuiltTask.cpp b/dm/DMQuiltTask.cpp
index 44c4341a7d79de5475c92b7116fa0ef09d84b8da..2f56b4c1ba1fc8a7fd886787f2f91f578a8af481 100644
--- a/dm/DMQuiltTask.cpp
+++ b/dm/DMQuiltTask.cpp
@@ -4,7 +4,7 @@
 
 #include "SkCommandLineFlags.h"
 #include "SkPicture.h"
-#include "SkThreadPool.h"
+#include "ThreadPool.h"
 
 DEFINE_bool(quilt, true, "If true, draw into a quilt of small tiles and compare.");
 DEFINE_int32(quiltTile, 16, "Dimension of (square) quilt tile.");
@@ -23,7 +23,7 @@ static int tiles_needed(int fullDimension, int tileDimension) {
     return (fullDimension + tileDimension - 1) / tileDimension;
 }
 
-class Tile : public SkRunnable {
+class Tile : public Runnable {
 public:
     Tile(int x, int y, SkColorType colorType,
          const SkPicture& picture, SkCanvas* canvas, SkMutex* mutex)
@@ -70,7 +70,7 @@ void QuiltTask::draw() {
     SkCanvas fullCanvas(full);
     SkMutex mutex;  // Guards fullCanvas.
 
-    SkThreadPool pool(FLAGS_quiltThreaded ? SkThreadPool::kThreadPerCore : 0);
+    ThreadPool pool(FLAGS_quiltThreaded ? ThreadPool::kThreadPerCore : 0);
 
     for (int y = 0; y < tiles_needed(full.height(), FLAGS_quiltTile); y++) {
         for (int x = 0; x < tiles_needed(full.width(), FLAGS_quiltTile); x++) {