Add a src rect to drawImageLattice() API

src/pipe/SkPipeReader.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvas.h"
 #include "SkDeduper.h"
 #include "SkPicture.h"
@@ skipping 541 matching lines @@
     }
     lattice.fXDivs = skip<int32_t>(reader, lattice.fXCount);
     lattice.fYDivs = skip<int32_t>(reader, lattice.fYCount);
     if (packedVerb & kHasFlags_DrawImageLatticeMask) {
         int32_t count = (lattice.fXCount + 1) * (lattice.fYCount + 1);
         SkASSERT(count > 0);
         lattice.fFlags = skip<SkCanvas::Lattice::Flags>(reader, SkAlign4(count));
     } else {
         lattice.fFlags = nullptr;
     }
+    lattice.fBounds = *skip<SkIRect>(reader);
     const SkRect* dst = skip<SkRect>(reader);
 
     SkPaint paintStorage, *paint = nullptr;
     if (packedVerb & kHasPaint_DrawImageLatticeMask) {
         paintStorage = read_paint(reader);
         paint = &paintStorage;
     }
     canvas->drawImageLattice(image.get(), lattice, *dst, paint);
 }
 
@@ skipping 385 matching lines @@
 
 bool SkPipeDeserializer::playback(const void* data, size_t size, SkCanvas* canvas) {
     SkPipeInflator inflator(&fImpl->fImages, &fImpl->fPictures,
                             &fImpl->fTypefaces, &fImpl->fFactories,
                             fImpl->fTFDeserializer);
     SkPipeReader reader(this, data, size);
     reader.setInflator(&inflator);
     return do_playback(reader, canvas);
 }