Partially restore small-T optimization for very small (empty) T.

tests/RecordOptsTest.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 "Test.h"
 
 #include "SkRecord.h"
@@ skipping 19 matching lines @@
     void operator()(const T&) { *ptr = NULL; type = U::kType; }
 };
 
 // Assert that the ith command in record is of type T, and return it.
 template <typename T>
 static const T* assert_type(skiatest::Reporter* r, const SkRecord& record, unsigned index) {
     const T* ptr = NULL;
     ReadAs<T> reader(&ptr);
     record.visit(index, reader);
     REPORTER_ASSERT(r, T::kType == reader.type);
-    REPORTER_ASSERT(r, ptr != NULL);
     return ptr;
 }
 
 DEF_TEST(RecordOpts_Culling, r) {
     SkRecord record;
     SkRecorder recorder(SkRecorder::kWriteOnly_Mode, &record, W, H);
 
     recorder.drawRect(SkRect::MakeWH(1000, 10000), SkPaint());
 
     recorder.pushCull(SkRect::MakeWH(100, 100));
@@ skipping 168 matching lines @@
     // SaveLayer/Restore removed: we can fold in the alpha!
     recorder.saveLayer(NULL, &goodLayerPaint);
         recorder.drawRect(draw, goodDrawPaint);
     recorder.restore();
     assert_savelayer_restore(r, &record, 15, true);
 
     const SkRecords::DrawRect* drawRect = assert_type<SkRecords::DrawRect>(r, record, 16);
     REPORTER_ASSERT(r, drawRect != NULL);
     REPORTER_ASSERT(r, drawRect->paint.getColor() == 0x03020202);
 }