Switch SkPDFStream's internal storage from SkStream to SkData

src/pdf/SkPDFImage.cpp

 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPDFImage.h"
 
 #include "SkBitmap.h"
@@ skipping 494 matching lines @@
       fEncoder(encoder) {
 
     if (bitmap.isImmutable()) {
         fBitmap = bitmap;
     } else {
         bitmap.deepCopyTo(&fBitmap);
         fBitmap.setImmutable();
     }
 
     if (stream != NULL) {
-        setData(stream);
+        this->setData(stream);
         fStreamValid = true;
     } else {
         fStreamValid = false;
     }
 
     SkColorType colorType = fBitmap.colorType();
 
     insertName("Type", "XObject");
     insertName("Subtype", "Image");
 
@@ skipping 65 matching lines @@
                 get_uncompressed_size(fBitmap, fSrcRect) > 1) {
             SkBitmap subset;
             // Extract subset
             if (!fBitmap.extractSubset(&subset, fSrcRect)) {
                 return false;
             }
             size_t pixelRefOffset = 0;
             SkAutoTUnref<SkData> data(fEncoder(&pixelRefOffset, subset));
             if (data.get() && data->size() < get_uncompressed_size(fBitmap,
                                                                    fSrcRect)) {
-                SkAutoTUnref<SkStream> stream(SkNEW_ARGS(SkMemoryStream,
-                                                         (data)));
-                setData(stream.get());
+                this->setData(data.get());
 
                 insertName("Filter", "DCTDecode");
                 insertInt("ColorTransform", kNoColorTransform);
-                insertInt("Length", getData()->getLength());
+                insertInt("Length", this->dataSize());
                 setState(kCompressed_State);
                 return true;
             }
         }
         // Fallback method
         if (!fStreamValid) {
             SkAutoTUnref<SkStream> stream(
                     extract_image_data(fBitmap, fSrcRect, fIsAlpha, NULL));
-            setData(stream);
+            this->setData(stream);
             fStreamValid = true;
         }
         return INHERITED::populate(catalog);
     } else if (getState() == kNoCompression_State &&
             !skip_compression(catalog) &&
             (SkFlate::HaveFlate() || fEncoder)) {
         // Compression has not been requested when the stream was first created,
         // but the new catalog wants it compressed.
         if (!getSubstitute()) {
             SkPDFStream* substitute = SkNEW_ARGS(SkPDFImage, (*this));
             setSubstitute(substitute);
             catalog->setSubstitute(this, substitute);
         }
         return false;
     }
     return true;
 }