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

src/core/SkBigPicture.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 "SkBBoxHierarchy.h"
 #include "SkBigPicture.h"
 #include "SkPictureCommon.h"
@@ skipping 70 matching lines @@
 }
 
 SkBigPicture::Analysis::Analysis(const SkRecord& record) {
     TRACE_EVENT0("disabled-by-default-skia", "SkBigPicture::Analysis::Analysis()");
     SkTextHunter   text;
     SkBitmapHunter bitmap;
     SkPathCounter  path;
 
     bool hasText = false, hasBitmap = false;
     for (int i = 0; i < record.count(); i++) {
-        hasText   = hasText   || record.visit<bool>(i,   text);
-        hasBitmap = hasBitmap || record.visit<bool>(i, bitmap);
-        record.visit<void>(i, path);
+        hasText   = hasText   || record.visit(i,   text);
+        hasBitmap = hasBitmap || record.visit(i, bitmap);
+        record.visit(i, path);
     }
 
     fHasText                    = hasText;
     fWillPlaybackBitmaps        = hasBitmap;
     fNumSlowPathsAndDashEffects = SkTMin<int>(path.fNumSlowPathsAndDashEffects, 255);
 }