SkPDF: refactor font subset: fewer copies

src/pdf/SkPDFDocument.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorSpace_Base.h"
 #include "SkPDFCanvas.h"
 #include "SkPDFDevice.h"
@@ skipping 302 matching lines @@
     }
 }
 #endif  // SK_SUPPORT_LEGACY_DOCUMENT_API
 
 static sk_sp<SkData> SkSrgbIcm() {
     auto srgb = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
     return as_CSB(srgb)->writeToICC();
 }
 
 static sk_sp<SkPDFStream> make_srgb_color_profile() {
-    sk_sp<SkData> profile = SkSrgbIcm();
-    sk_sp<SkPDFStream> stream = sk_make_sp<SkPDFStream>(profile.get());
+    sk_sp<SkPDFStream> stream = sk_make_sp<SkPDFStream>(SkSrgbIcm());
     stream->insertInt("N", 3);
     sk_sp<SkPDFArray> array = sk_make_sp<SkPDFArray>();
     array->appendScalar(0.0f);
     array->appendScalar(1.0f);
     array->appendScalar(0.0f);
     array->appendScalar(1.0f);
     array->appendScalar(0.0f);
     array->appendScalar(1.0f);
     stream->insertObject("Range", std::move(array));
     return stream;
@@ skipping 82 matching lines @@
 }
 
 sk_sp<SkDocument> SkDocument::MakePDF(SkWStream* stream,
                                       SkScalar dpi,
                                       const SkDocument::PDFMetadata& metadata,
                                       sk_sp<SkPixelSerializer> jpegEncoder,
                                       bool pdfa) {
     return SkPDFMakeDocument(stream, nullptr, dpi, metadata,
                              std::move(jpegEncoder), pdfa);
 }