Move PdfTokenLooper into its own file.

Otherwise, leave the class unchanged.

Review URL: https://codereview.chromium.org/79773002

git-svn-id: http://skia.googlecode.com/svn/trunk/gyp@12333 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/pdfviewer_lib.gyp b/pdfviewer_lib.gyp
index de9f057..37b1285 100644
--- a/pdfviewer_lib.gyp
+++ b/pdfviewer_lib.gyp
@@ -13,6 +13,7 @@
         # order to not be considered the public API.
         '../experimental/PdfViewer/inc/SkPdfContext.h',
         '../experimental/PdfViewer/inc/SkPdfRenderer.h',
+        '../experimental/PdfViewer/inc/SkPdfTokenLooper.h',
 
         '../experimental/PdfViewer/src/SkPdfContext.cpp',
         '../experimental/PdfViewer/src/SkPdfRenderer.cpp',