SkPDF: move all pdf sources into src/pdf

src/doc/SkDocument_XPS_None.cpp

Index: src/doc/SkDocument_XPS_None.cpp
diff --git a/src/doc/SkDocument_XPS_None.cpp b/src/doc/SkDocument_XPS_None.cpp
deleted file mode 100644
index 32b18fb221caa30c15263e6e6b1640fbf11bf5c3..0000000000000000000000000000000000000000
--- a/src/doc/SkDocument_XPS_None.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkTypes.h"
-#if !defined(SK_BUILD_FOR_WIN32)
-
-#include "SkDocument.h"
-SkDocument* SkDocument::CreateXPS(SkWStream*, SkScalar) { return nullptr; }
-SkDocument* SkDocument::CreateXPS(const char path[], SkScalar) { return nullptr; }
-
-#endif//!defined(SK_BUILD_FOR_WIN32)