SkRecord: infer return type for visit() and mutate().

dm/DMSrcSink.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "DMSrcSink.h"
 #include "SkAndroidCodec.h"
 #include "SkCodec.h"
@@ skipping 824 matching lines @@
         //        We have disabled these tests in DM.cpp.
         SkASSERT(kGray_8_SkColorType != gen->getInfo().colorType());
 
         sk_sp<SkImage> image(SkImage::MakeFromGenerator(gen.release(), nullptr));
         if (!image) {
             return "Could not create image from codec image generator.";
         }
         canvas->drawImage(image, 0, 0);
         return "";
     }
-    
+
     // Test various color and alpha types on CPU
     SkImageInfo decodeInfo = gen->getInfo().makeAlphaType(fDstAlphaType);
-    
+
     if (kGray_8_SkColorType == decodeInfo.colorType() &&
             kOpaque_SkAlphaType != decodeInfo.alphaType()) {
         return Error::Nonfatal("Avoid requesting non-opaque kGray8 decodes.");
     }
-    
+
     SkAutoTUnref<SkColorTable> colorTable(nullptr);
     SkPMColor* colorPtr = nullptr;
     int* colorCountPtr = nullptr;
     int maxColors = 256;
     if (kIndex_8_SkColorType == decodeInfo.colorType()) {
         SkPMColor colors[256];
         colorTable.reset(new SkColorTable(colors, maxColors));
         colorPtr = const_cast<SkPMColor*>(colorTable->readColors());
         colorCountPtr = &maxColors;
     }
 
     SkBitmap bitmap;
     if (!bitmap.tryAllocPixels(decodeInfo, nullptr, colorTable.get())) {
         return SkStringPrintf("Image(%s) is too large (%d x %d)", fPath.c_str(),
                               decodeInfo.width(), decodeInfo.height());
     }
-    
+
     if (!gen->getPixels(decodeInfo, bitmap.getPixels(), bitmap.rowBytes(), colorPtr,
                         colorCountPtr))
     {
         return SkStringPrintf("Image generator could not getPixels() for %s\n", fPath.c_str());
     }
 
     premultiply_if_necessary(bitmap);
     canvas->drawBitmap(bitmap, 0, 0);
     return "";
 }
@@ skipping 620 matching lines @@
                                                         SkIntToScalar(size.height()));
 
         SkAutoTDelete<SkDrawableList> drawables(recorder.detachDrawableList());
         const SkDrawableList empty;
 
         DrawsAsSingletonPictures drawsAsSingletonPictures = {
             macroCanvas,
             drawables ? *drawables : empty,
         };
         for (int i = 0; i < skr.count(); i++) {
-            skr.visit<void>(i, drawsAsSingletonPictures);
+            skr.visit(i, drawsAsSingletonPictures);
         }
         sk_sp<SkPicture> macroPic(macroRec.finishRecordingAsPicture());
 
         canvas->drawPicture(macroPic);
         return check_against_reference(bitmap, src, fSink);
     });
 }
 
 }  // namespace DM