use SkTaskGroup::batch

src/core/SkMultiPictureDraw.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.
  */
 
 #if SK_SUPPORT_GPU
 #include "GrLayerHoister.h"
 #include "GrRecordReplaceDraw.h"
@@ skipping 69 matching lines @@
     AutoMPDReset(SkMultiPictureDraw* mpd) : fMPD(mpd) {}
     ~AutoMPDReset() { fMPD->reset(); }
 };
 
 void SkMultiPictureDraw::draw() {
     AutoMPDReset mpdreset(this);
     // we place the taskgroup after the MPDReset, to ensure that we don't delete the DrawData
     // objects until after we're finished the tasks (which have pointers to the data).
 
     SkTaskGroup group;
-    for (int i = 0; i < fThreadSafeDrawData.count(); ++i) {
-        group.add(DrawData::Draw, &fThreadSafeDrawData[i]);
-    }
+    group.batch(DrawData::Draw, fThreadSafeDrawData.begin(), fThreadSafeDrawData.count());
     // we deliberately don't call wait() here, since the destructor will do that, this allows us
     // to continue processing gpu-data without having to wait on the cpu tasks.
 
     const int count = fGPUDrawData.count();
     if (0 == count) {
         return;
     }
 
 #ifndef SK_IGNORE_GPU_LAYER_HOISTING
     GrContext* context = fGPUDrawData[0].fCanvas->getGrContext();
@@ skipping 78 matching lines @@
 
 #ifndef SK_IGNORE_GPU_LAYER_HOISTING
     GrLayerHoister::UnlockLayers(context, atlasedNeedRendering);
     GrLayerHoister::UnlockLayers(context, atlasedRecycled);
 #if !GR_CACHE_HOISTED_LAYERS
     GrLayerHoister::PurgeCache(context);
 #endif
 #endif
 }