Use SkDocument_PDF_None if pdf support is not enabled.

skia/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 if (current_cpu == "arm") {
   import("//build/config/arm.gni")
 }
@@ skipping 473 matching lines @@
     deps += [
       "//third_party/android_tools:cpu_features",
       "//third_party/expat",
       "//third_party/freetype-android:freetype",
     ]
   }
 
   if (skia_support_pdf) {
     deps += [ "//third_party/sfntly" ]
     sources += gypi_skia_pdf.sources
+  } else {
+    sources += [ "//third_party/skia/src/pdf/SkDocument_PDF_None.cpp" ]
   }
 
   if (is_android && !is_debug) {
     configs -= [ "//build/config/compiler:default_optimization" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }
 
   if (is_ios) {
     libs = [ "ImageIO.framework" ]
     set_sources_assignment_filter([])
@@ skipping 214 matching lines @@
     ]
 
     deps = [
       ":skia",
       "//base",
       "//base/test:test_support",
       "//build/config/sanitizers:deps",
     ]
   }
 }