Merge to XFA: Allow compiling PDFium without V8.

samples/BUILD.gn

Index: samples/BUILD.gn
diff --git a/samples/BUILD.gn b/samples/BUILD.gn
index ca7cafa68557846f5ec7e894fb885ddd56186dcf..6a5cf4e69c46e70fc52b1b47c59047f893085b17 100644
--- a/samples/BUILD.gn
+++ b/samples/BUILD.gn
@@ -2,6 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("../pdfium.gni")
+
 group("samples") {
   deps = [
     ":pdfium_test",
@@ -14,6 +16,11 @@ config("pdfium_samples_config") {
     "PNGPREFIX_H",
     "PNG_USE_READ_MACROS",
   ]
+  if (pdf_enable_v8) {
+    defines += [
+      "PDF_ENABLE_V8",
+    ]
+  }
 }
 
 executable("pdfium_test") {
@@ -23,12 +30,16 @@ executable("pdfium_test") {
   ]
   deps = [
     "//third_party/pdfium",
-    "//v8:v8_libplatform",
-  ]
-  include_dirs = [
-    "//v8",
-    "//v8/include",
   ]
+  if (pdf_enable_v8) {
+    deps += [
+      "//v8:v8_libplatform",
+    ]
+    include_dirs = [
+      "//v8",
+      "//v8/include",
+    ]
+  }
   configs += [ ":pdfium_samples_config" ]
 }