Move SkPdfContext into its own files.

Otherwise, the class is unchanged.

Review URL: https://codereview.chromium.org/77763007

git-svn-id: http://skia.googlecode.com/svn/trunk/gyp@12330 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/pdfviewer_lib.gyp b/pdfviewer_lib.gyp
index fd6d0fc..de9f057 100644
--- a/pdfviewer_lib.gyp
+++ b/pdfviewer_lib.gyp
@@ -11,8 +11,10 @@
       'sources': [
         # FIXME: Include directory is named "inc" (instead of "include") in
         # order to not be considered the public API.
+        '../experimental/PdfViewer/inc/SkPdfContext.h',
         '../experimental/PdfViewer/inc/SkPdfRenderer.h',
 
+        '../experimental/PdfViewer/src/SkPdfContext.cpp',
         '../experimental/PdfViewer/src/SkPdfRenderer.cpp',
         '../experimental/PdfViewer/src/SkTDStackNester.h',