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

tests/RecordTest.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 "RecordTestUtils.h"
 #include "SkBitmap.h"
 #include "SkImageInfo.h"
@@ skipping 11 matching lines @@
     template <typename T> void operator()(const T&) { }
 
     void operator()(const SkRecords::DrawRect& draw) {
         fArea += (int)(draw.rect.width() * draw.rect.height());
     }
 
     int area() const { return fArea; }
 
     void apply(const SkRecord& record) {
         for (int i = 0; i < record.count(); i++) {
-            record.visit<void>(i, *this);
+            record.visit(i, *this);
         }
     }
 
 private:
     int fArea;
 };
 
 // Scales out the bottom-right corner of any DrawRect command it sees by 2x.
 struct Stretch {
     template <typename T> void operator()(T*) {}
     void operator()(SkRecords::DrawRect* draw) {
         draw->rect.fRight *= 2;
         draw->rect.fBottom *= 2;
     }
 
     void apply(SkRecord* record) {
         for (int i = 0; i < record->count(); i++) {
-            record->mutate<void>(i, *this);
+            record->mutate(i, *this);
         }
     }
 };
 
 #define APPEND(record, type, ...) new (record.append<type>()) type{__VA_ARGS__}
 
 // Basic tests for the low-level SkRecord code.
 DEF_TEST(Record, r) {
     SkRecord record;
 
@@ skipping 49 matching lines @@
     REPORTER_ASSERT(r, is_aligned(record.alloc<uint32_t>()));
     REPORTER_ASSERT(r, is_aligned(record.alloc<void*>()));
 
     // It's not clear if we care that 8-byte values are aligned on 32-bit machines.
     if (sizeof(void*) == 8) {
         REPORTER_ASSERT(r, is_aligned(record.alloc<double>()));
         REPORTER_ASSERT(r, is_aligned(record.alloc<uint64_t>()));
     }
 }