SkXPS:  Begin refactoring SkXPSDevice

A later CL will move all document-level fields  and methods into
SkXPSDocument.

  * SkXPSDocument cnstructor requires a xps factory ptr.

  * All device layers share ownership of a single factory.

  * renames SkDocument_XPS to the easier-to-say SkXPSDocument.

  * Moves autocoinitialize to DM.

TODO: pipe the IXpsOMObjectFactory* into the SkDocument api.

No change in rendered documents.

Change-Id: I8a4680a3603951b1ce5f6c1de48714d4902061a9
Reviewed-on: https://skia-review.googlesource.com/7998
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/src/xps/SkXPSDevice.h b/src/xps/SkXPSDevice.h
index db8436d..0ad9939 100644
--- a/src/xps/SkXPSDevice.h
+++ b/src/xps/SkXPSDevice.h
@@ -40,7 +40,7 @@
     SK_API SkXPSDevice(SkISize);
     SK_API virtual ~SkXPSDevice();
 
-    bool beginPortfolio(SkWStream* outputStream);
+    bool beginPortfolio(SkWStream* outputStream, IXpsOMObjectFactory*);
     /**
       @param unitsPerMeter converts geometry units into physical units.
       @param pixelsPerMeter resolution to use when geometry must be rasterized.
@@ -161,9 +161,8 @@
     };
     friend HRESULT subset_typeface(TypefaceUse* current);
 
-    SkXPSDevice(SkISize, IXpsOMObjectFactory*);
+    bool createCanvasForLayer();
 
-    SkAutoCoInitialize fAutoCo;
     SkTScopedComPtr<IXpsOMObjectFactory> fXpsFactory;
     SkTScopedComPtr<IStream> fOutputStream;
     SkTScopedComPtr<IXpsOMPackageWriter> fPackageWriter;