Revert "Revert of setConfig -> setInfo (https://codereview.chromium.org/308683005/)"

src/gpu/GrPictureUtils.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 "GrPictureUtils.h"
 #include "SkDevice.h"
 #include "SkDraw.h"
@@ skipping 23 matching lines @@
         fPicture = picture;
         fSaveLayerDepth = saveLayerDepth;
         fInfo.fValid = true;
         fInfo.fSize.set(width, height);
         fInfo.fPaint = NULL;
         fInfo.fSaveLayerOpID = fPicture->EXPERIMENTAL_curOpID();
         fInfo.fRestoreOpID = 0;
         fInfo.fHasNestedLayers = false;
         fInfo.fIsNested = (2 == fSaveLayerDepth);
 
-        fEmptyBitmap.setConfig(SkImageInfo::Make(fInfo.fSize.fWidth,
-                                                 fInfo.fSize.fHeight,
-                                                 kUnknown_SkColorType,
-                                                 kIgnore_SkAlphaType));
+        fEmptyBitmap.setInfo(SkImageInfo::MakeUnknown(fInfo.fSize.fWidth, fInfo.fSize.fHeight));
         fAccelData = accelData;
         fAlreadyDrawn = false;
     }
 
     virtual ~GrGatherDevice() { }
 
     virtual int width() const SK_OVERRIDE { return fInfo.fSize.width(); }
     virtual int height() const SK_OVERRIDE { return fInfo.fSize.height(); }
     virtual bool isOpaque() const SK_OVERRIDE { return false; }
     virtual SkBitmap::Config config() const SK_OVERRIDE {
@@ skipping 220 matching lines @@
 void GatherGPUInfo(SkPicture* pict, GPUAccelData* accelData) {
     if (0 == pict->width() || 0 == pict->height()) {
         return ;
     }
 
     GrGatherDevice device(pict->width(), pict->height(), pict, accelData, 0);
     GrGatherCanvas canvas(&device, pict);
 
     canvas.gather();
 }