Use new API instead of the deprecated ones

src/codec/SkRawCodec.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 "SkCodec.h"
 #include "SkCodecPriv.h"
 #include "SkColorPriv.h"
@@ skipping 554 matching lines @@
     } else {
         rawStream.reset(new SkRawBufferedStream(stream));
     }
 
     // Does not take the ownership of rawStream.
     SkPiexStream piexStream(rawStream.get());
     ::piex::PreviewImageData imageData;
     if (::piex::IsRaw(&piexStream)) {
         ::piex::Error error = ::piex::GetPreviewImageData(&piexStream, &imageData);
 
-        if (error == ::piex::Error::kOk && imageData.preview_length > 0) {
+        if (error == ::piex::Error::kOk && imageData.preview.length > 0) {

[scroggo, 2016/02/23 15:55:23]

Unfortunately, this will mean that we need to update piex in nyc-dev in order to
merge Skia into master. The way we typically handle this is is with macros.
Something like:

#ifdef SK_LEGACY_PREVIEW_LENGTH
  if (error == ::piex::Error::kOk && imageData.preview_length > 0) {
#else
  if (error == ::piex::Error::kOk && imageData.preview.length > 0) {
#endif

We can define SK_LEGACY_PREVIEW_LENGTH in Android until piex gets updated to
have the new API. Then we can delete the old code in Skia and then delete the
old API in piex.

 #if !defined(GOOGLE3)
             // transferBuffer() is destructive to the rawStream. Abandon the rawStream after this
             // function call.
             // FIXME: one may avoid the copy of memoryStream and use the buffered rawStream.
             SkMemoryStream* memoryStream =
-                rawStream->transferBuffer(imageData.preview_offset, imageData.preview_length);
+                rawStream->transferBuffer(imageData.preview.offset, imageData.preview.length);
             return memoryStream ? SkJpegCodec::NewFromStream(memoryStream) : nullptr;
 #else
             return nullptr;
 #endif
         } else if (error == ::piex::Error::kFail) {
             return nullptr;
         }
     }
 
     // Takes the ownership of the rawStream.
@@ skipping 96 matching lines @@
     SkISize sizeFloor = this->onGetScaledDimensions(1.f / std::floor(fullShortEdge / shortEdge));
     SkISize sizeCeil = this->onGetScaledDimensions(1.f / std::ceil(fullShortEdge / shortEdge));
     return sizeFloor == dim || sizeCeil == dim;
 }
 
 SkRawCodec::~SkRawCodec() {}
 
 SkRawCodec::SkRawCodec(SkDngImage* dngImage)
     : INHERITED(dngImage->getImageInfo(), nullptr)
     , fDngImage(dngImage) {}