Connect Skia PDF backend to printing subsystem.

skia/config/SkUserConfig.h

Index: skia/config/SkUserConfig.h
diff --git a/skia/config/SkUserConfig.h b/skia/config/SkUserConfig.h
index d9746b739d92414f1aaf0f37b3c648d7fedbbccc..a7d830ae860cba8df5d298e0fdd2a798f3f33212 100644
--- a/skia/config/SkUserConfig.h
+++ b/skia/config/SkUserConfig.h
@@ -113,6 +113,33 @@
  */
 //#define SK_USE_RUNTIME_GLOBALS
 
+/*  If zlib is available and you want to support the flate compression
+    algorithm (used in PDF generation), define SK_ZLIB_INCLUDE to be the
+    include path.
+ */
+//#define SK_ZLIB_INCLUDE <zlib.h>
+#if defined(USE_SYSTEM_ZLIB)
+#define SK_ZLIB_INCLUDE <zlib.h>
+#else
+#define SK_ZLIB_INCLUDE "third_party/zlib/zlib.h"
+#define MOZ_Z_inflate inflate
+#define MOZ_Z_inflateInit_ inflateInit_
+#define MOZ_Z_inflateEnd inflateEnd
+#define MOZ_Z_deflate deflate
+#define MOZ_Z_deflateInit_ deflateInit_
+#define MOZ_Z_deflateEnd deflateEnd
+#endif
+
+/*  Define this to allow PDF scalars above 32k.  The PDF/A spec doesn't allow
+    them, but modern PDF interpreters should handle them just fine.
+ */
+//#define SK_ALLOW_LARGE_PDF_SCALARS
+
+/*  Define this to remove dimension checks on bitmaps. Not all blits will be
+    correct yet, so this is mostly for debugging the implementation.
+ */
+//#define SK_ALLOW_OVER_32K_BITMAPS
+
 
 /*  To write debug messages to a console, skia will call SkDebugf(...) following
     printf conventions (e.g. const char* format, ...). If you want to redirect