clean up more dead code

src/core/SkTaskGroup.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkOnce.h"
-#include "SkRunnable.h"
 #include "SkSemaphore.h"
 #include "SkSpinlock.h"
 #include "SkTArray.h"
 #include "SkTDArray.h"
 #include "SkTaskGroup.h"
 #include "SkThreadUtils.h"
 
 #if defined(SK_BUILD_FOR_WIN32)
     static void query_num_cores(int* num_cores) {
         SYSTEM_INFO sysinfo;
@@ skipping 13 matching lines @@
     static int num_cores = 0;
     SkOnce(&g_query_num_cores_once, query_num_cores, &num_cores);
     SkASSERT(num_cores > 0);
     return num_cores;
 }
 
 namespace {
 
 class ThreadPool : SkNoncopyable {
 public:
-    static void Add(SkRunnable* task, SkAtomic<int32_t>* pending) {
-        if (!gGlobal) {  // If we have no threads, run synchronously.
-            return task->run();
-        }
-        gGlobal->add([task]() { task->run(); }, pending);
-    }
-
     static void Add(std::function<void(void)> fn, SkAtomic<int32_t>* pending) {
         if (!gGlobal) {
             return fn();
         }
         gGlobal->add(fn, pending);
     }
 
     static void Batch(int N, std::function<void(int)> fn, SkAtomic<int32_t>* pending) {
         if (!gGlobal) {
             for (int i = 0; i < N; i++) { fn(i); }
@@ skipping 32 matching lines @@
     }
 
 private:
     struct AutoLock {
         AutoLock(SkSpinlock* lock) : fLock(lock) { fLock->acquire(); }
         ~AutoLock() { fLock->release(); }
     private:
         SkSpinlock* fLock;
     };
 
-    static void CallRunnable(void* arg) { static_cast<SkRunnable*>(arg)->run(); }
-
     struct Work {
         std::function<void(void)> fn; // A function to call
         SkAtomic<int32_t>* pending;   // then decrement pending afterwards.
     };
 
     explicit ThreadPool(int threads) {
         if (threads == -1) {
             threads = sk_num_cores();
         }
         for (int i = 0; i < threads; i++) {
@@ skipping 92 matching lines @@
     if (threads != 0) {
         ThreadPool::gGlobal = new ThreadPool(threads);
     }
 }
 
 SkTaskGroup::Enabler::~Enabler() { delete ThreadPool::gGlobal; }
 
 SkTaskGroup::SkTaskGroup() : fPending(0) {}
 
 void SkTaskGroup::wait()                            { ThreadPool::Wait(&fPending); }
-void SkTaskGroup::add(SkRunnable* task)             { ThreadPool::Add(task, &fPending); }
 void SkTaskGroup::add(std::function<void(void)> fn) { ThreadPool::Add(fn, &fPending); }
 void SkTaskGroup::batch(int N, std::function<void(int)> fn) {
     ThreadPool::Batch(N, fn, &fPending);
 }