Revert of SkThreadPool ~~> SkTaskGroup

tests/Test.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Test.h"
 
 #include "SkCommandLineFlags.h"
@@ skipping 57 matching lines @@
 protected:
     virtual void onReportFailed(const SkString& desc) SK_OVERRIDE {
         fFailures.push_back(desc);
     }
 
     // Proxy down to fReporter.  We assume these calls are threadsafe.
     virtual bool allowExtendedTest() const SK_OVERRIDE {
         return fReporter->allowExtendedTest();
     }
 
+    virtual bool allowThreaded() const SK_OVERRIDE {
+        return fReporter->allowThreaded();
+    }
+
     virtual void bumpTestCount() SK_OVERRIDE {
         fReporter->bumpTestCount();
     }
 
     virtual bool verbose() const SK_OVERRIDE {
         return fReporter->verbose();
     }
 
 private:
     Reporter* fReporter;  // Unowned.
@@ skipping 21 matching lines @@
       fReporter->reportFailed(local.failure(i));
     }
     fReporter->endTest(this);
 
 }
 
 SkString Test::GetTmpDir() {
     const char* tmpDir = FLAGS_tmpDir.isEmpty() ? NULL : FLAGS_tmpDir[0];
     return SkString(tmpDir);
 }