Bug 1380301 - Add missing "#ifdef MOZ_ENABLE_SKIA_PDF" to nsDeviceContextSpecWin.h r=heycam

MozReview-Commit-ID: YxvOID7Xbp

--HG--
extra : rebase_source : 5e8b4e37e7f74e4f0eecd35b5e5366a7953cb996

widget/windows/nsDeviceContextSpecWin.h

@@ -27,7 +27,9 @@ class PDFViaEMFPrintHelper;
 
 class nsDeviceContextSpecWin : public nsIDeviceContextSpec
 {
+#ifdef MOZ_ENABLE_SKIA_PDF
   typedef mozilla::widget::PDFViaEMFPrintHelper PDFViaEMFPrintHelper;
+#endif
 
 public:
   nsDeviceContextSpecWin();