Add bitmaps and skp output to Skia port

samples/samples.gyp

 # Copyright 2014 PDFium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'pdf_enable_v8%': 1,
     'pdf_enable_xfa%': 0,  # Set to 1 in standalone builds by standalone.gypi.
   },
   'target_defaults': {
@@ skipping 48 matching lines @@
         ['pdf_enable_xfa==0', {
           'dependencies': [
             '../third_party/third_party.gyp:fx_lpng',
           ],
         }],
         ['pdf_enable_v8==1', {
           'dependencies': [
             '<(DEPTH)/v8/tools/gyp/v8.gyp:v8_libplatform',
           ],
         }],
+        ['pdf_use_skia==1', {
+          'defines': ['PDF_ENABLE_SKIA'],
+          'dependencies': [
+            '<(DEPTH)/skia/skia.gyp:skia',
+          ],
+        }],
       ],
     },
     {
       'target_name': 'pdfium_diff',
       'type': 'executable',
       'variables': { 'enable_wexit_time_destructors': 1, },
       'dependencies': [
         '../pdfium.gyp:pdfium',
         '../third_party/third_party.gyp:pdfium_base',
       ],
       'sources': [
         'image_diff.cc',
         'image_diff_png.h',
         'image_diff_png.cc',
       ],
       'conditions': [
         ['pdf_enable_xfa==0', {
           'dependencies': [
             '../third_party/third_party.gyp:fx_lpng',
           ],
         }],
       ],
     },
   ],
 }