refactor DM::SetupBitmap

dm/DMSKPTask.cpp

 #include "DMRecordTask.h"
 #include "DMSKPTask.h"
 #include "DMUtil.h"
 #include "DMWriteTask.h"
 
 namespace DM {
 
 // foo_bar.skp -> foo-bar_skp
 static SkString filename_to_task_name(SkString filename) {
     for (size_t i = 0; i < filename.size(); i++) {
         if ('_' == filename[i]) { filename[i] = '-'; }
         if ('.' == filename[i]) { filename[i] = '_'; }
     }
     return filename;
 }
 
 SKPTask::SKPTask(Reporter* r, TaskRunner* tr, SkPicture* pic, SkString filename)
     : CpuTask(r, tr), fPicture(SkRef(pic)), fName(filename_to_task_name(filename)) {}
 
 void SKPTask::draw() {
     SkBitmap bitmap;
-    SetupBitmap(kN32_SkColorType, *fPicture, &bitmap);
+    AllocatePixels(kN32_SkColorType, fPicture->width(), fPicture->height(), &bitmap);
     DrawPicture(fPicture, &bitmap);
 
     this->spawnChild(SkNEW_ARGS(RecordTask,
                                 (*this, fPicture, bitmap, RecordTask::kNoOptimize_Mode)));
     this->spawnChild(SkNEW_ARGS(RecordTask,
                                 (*this, fPicture, bitmap, RecordTask::kOptimize_Mode)));
     this->spawnChild(SkNEW_ARGS(WriteTask, (*this, bitmap)));
 }
 
 }  // namespace DM