SkPDF: clean up fRasterDpi

  - PDFDevice no longer has a fRasterDpi; simply queries document.
  - #define DPI_FOR_RASTER_SCALE_ONE becomes constexpr float.
  - PDFShader::GetPDFShader no longer takes rasterScale or dpi
  - Remove un-needed factory functions.  We're all adults here.

Change-Id: Id2ce75d4e61af385763ccfb1db210465a1600067
Reviewed-on: https://skia-review.googlesource.com/21348
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/bench/PDFBench.cpp b/bench/PDFBench.cpp
index c07bc222c9..e0dfc75821 100644
--- a/bench/PDFBench.cpp
+++ b/bench/PDFBench.cpp
@@ -216,10 +216,9 @@ struct PDFShaderBench : public Benchmark {
             SkNullWStream nullStream;
             SkPDFDocument doc(&nullStream, nullptr, 72,
                               SkDocument::PDFMetadata(), nullptr, false);
-            sk_sp<SkPDFObject> shader(
-                    SkPDFShader::GetPDFShader(
-                            &doc, 72, fShader.get(), SkMatrix::I(),
-                            SkIRect::MakeWH(400,400), 72));
+            sk_sp<SkPDFObject> shader =
+                    SkPDFShader::GetPDFShader(&doc, fShader.get(), SkMatrix::I(),
+                                              SkIRect::MakeWH(400,400));
         }
     }
 };