Allow compiling PDFium without V8.

BUILD.gn

 # Copyright 2014 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("//testing/test.gni")
-
-pdf_use_skia = false
-
-declare_args() {
-  # On Android there's no system FreeType. On Windows and Mac, only a few
-  # methods are used from it.
-  pdfium_bundle_freetype = !is_linux
-}
+import("pdfium.gni")
 
 config("pdfium_config") {
   cflags = []
   include_dirs = [ "third_party/freetype/include" ]
   defines = [
     "OPJ_STATIC",
     "V8_DEPRECATION_WARNINGS",
     "_CRT_SECURE_NO_WARNINGS",
   ]
 
   if (pdf_use_skia) {
     defines += [ "_SKIA_SUPPORT_" ]
   }
 
+  if (pdf_enable_v8) {
+    defines += [ "PDF_ENABLE_V8" ]
+  }
+
   if (is_linux) {
     if (current_cpu == "x64") {
       defines += [ "_FX_CPU_=_FX_X64_" ]
       cflags += [ "-fPIC" ]
     } else if (current_cpu == "x86") {
       defines += [ "_FX_CPU_=_FX_X86_" ]
     }
   }
 
   if (is_win) {
@@ skipping 66 matching lines @@
     ":fdrm",
     ":formfiller",
     ":fpdfapi",
     ":fpdfdoc",
     ":fpdftext",
     ":fxcodec",
     ":fxcrt",
     ":fxedit",
     ":fxge",
     ":javascript",
-    ":jsapi",
     ":pdfwindow",
   ]
 
   if (is_win) {
     libs += [
       "advapi32.lib",
       "gdi32.lib",
       "user32.lib",
     ]
   }
@@ skipping 500 matching lines @@
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     ":pdfium_config",
     "//build/config/compiler:no_chromium_code",
   ]
 }
 
 static_library("javascript") {
   sources = [
     "fpdfsdk/include/javascript/IJavaScript.h",
-    "fpdfsdk/src/javascript/Consts.cpp",
-    "fpdfsdk/src/javascript/Consts.h",
-    "fpdfsdk/src/javascript/Document.cpp",
-    "fpdfsdk/src/javascript/Document.h",
-    "fpdfsdk/src/javascript/Field.cpp",
-    "fpdfsdk/src/javascript/Field.h",
-    "fpdfsdk/src/javascript/Icon.cpp",
-    "fpdfsdk/src/javascript/Icon.h",
-    "fpdfsdk/src/javascript/JS_Context.cpp",
-    "fpdfsdk/src/javascript/JS_Context.h",
-    "fpdfsdk/src/javascript/JS_Define.h",
-    "fpdfsdk/src/javascript/JS_EventHandler.cpp",
-    "fpdfsdk/src/javascript/JS_EventHandler.h",
-    "fpdfsdk/src/javascript/JS_GlobalData.cpp",
-    "fpdfsdk/src/javascript/JS_GlobalData.h",
-    "fpdfsdk/src/javascript/JS_Object.cpp",
-    "fpdfsdk/src/javascript/JS_Object.h",
-    "fpdfsdk/src/javascript/JS_Runtime.cpp",
-    "fpdfsdk/src/javascript/JS_Runtime.h",
-    "fpdfsdk/src/javascript/JS_Value.cpp",
-    "fpdfsdk/src/javascript/JS_Value.h",
-    "fpdfsdk/src/javascript/PublicMethods.cpp",
-    "fpdfsdk/src/javascript/PublicMethods.h",
-    "fpdfsdk/src/javascript/app.cpp",
-    "fpdfsdk/src/javascript/app.h",
-    "fpdfsdk/src/javascript/color.cpp",
-    "fpdfsdk/src/javascript/color.h",
-    "fpdfsdk/src/javascript/console.cpp",
-    "fpdfsdk/src/javascript/console.h",
-    "fpdfsdk/src/javascript/event.cpp",
-    "fpdfsdk/src/javascript/event.h",
-    "fpdfsdk/src/javascript/global.cpp",
-    "fpdfsdk/src/javascript/global.h",
-    "fpdfsdk/src/javascript/report.cpp",
-    "fpdfsdk/src/javascript/report.h",
-    "fpdfsdk/src/javascript/resource.cpp",
-    "fpdfsdk/src/javascript/resource.h",
-    "fpdfsdk/src/javascript/util.cpp",
-    "fpdfsdk/src/javascript/util.h",
   ]
-
+  if (pdf_enable_v8) {
+    sources += [
+      "fpdfsdk/src/javascript/Consts.cpp",
+      "fpdfsdk/src/javascript/Consts.h",
+      "fpdfsdk/src/javascript/Document.cpp",
+      "fpdfsdk/src/javascript/Document.h",
+      "fpdfsdk/src/javascript/Field.cpp",
+      "fpdfsdk/src/javascript/Field.h",
+      "fpdfsdk/src/javascript/Icon.cpp",
+      "fpdfsdk/src/javascript/Icon.h",
+      "fpdfsdk/src/javascript/JS_Context.cpp",
+      "fpdfsdk/src/javascript/JS_Context.h",
+      "fpdfsdk/src/javascript/JS_Define.h",
+      "fpdfsdk/src/javascript/JS_EventHandler.cpp",
+      "fpdfsdk/src/javascript/JS_EventHandler.h",
+      "fpdfsdk/src/javascript/JS_GlobalData.cpp",
+      "fpdfsdk/src/javascript/JS_GlobalData.h",
+      "fpdfsdk/src/javascript/JS_Object.cpp",
+      "fpdfsdk/src/javascript/JS_Object.h",
+      "fpdfsdk/src/javascript/JS_Runtime.cpp",
+      "fpdfsdk/src/javascript/JS_Runtime.h",
+      "fpdfsdk/src/javascript/JS_Value.cpp",
+      "fpdfsdk/src/javascript/JS_Value.h",
+      "fpdfsdk/src/javascript/PublicMethods.cpp",
+      "fpdfsdk/src/javascript/PublicMethods.h",
+      "fpdfsdk/src/javascript/app.cpp",
+      "fpdfsdk/src/javascript/app.h",
+      "fpdfsdk/src/javascript/color.cpp",
+      "fpdfsdk/src/javascript/color.h",
+      "fpdfsdk/src/javascript/console.cpp",
+      "fpdfsdk/src/javascript/console.h",
+      "fpdfsdk/src/javascript/event.cpp",
+      "fpdfsdk/src/javascript/event.h",
+      "fpdfsdk/src/javascript/global.cpp",
+      "fpdfsdk/src/javascript/global.h",
+      "fpdfsdk/src/javascript/report.cpp",
+      "fpdfsdk/src/javascript/report.h",
+      "fpdfsdk/src/javascript/resource.cpp",
+      "fpdfsdk/src/javascript/resource.h",
+      "fpdfsdk/src/javascript/util.cpp",
+      "fpdfsdk/src/javascript/util.h",
+      "fpdfsdk/include/jsapi/fxjs_v8.h",
+      "fpdfsdk/src/jsapi/fxjs_v8.cpp",
+    ]
+    include_dirs = [
+      "//v8",
+      "//v8/include",
+    ]
+    public_deps = [
+      "//v8",
+    ]
+  } else {
+    sources += [ "fpdfsdk/src/javascript/JS_Runtime_Stub.cpp" ]
+  }
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     ":pdfium_config",
     "//build/config/compiler:no_chromium_code",
   ]
-  include_dirs = [
-    "//v8",
-    "//v8/include",
-  ]
-
-  public_deps = [
-    "//v8",
-  ]
-}
-
-static_library("jsapi") {
-  sources = [
-    "fpdfsdk/include/jsapi/fxjs_v8.h",
-    "fpdfsdk/src/jsapi/fxjs_v8.cpp",
-  ]
-
-  configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [
-    ":pdfium_config",
-    "//build/config/compiler:no_chromium_code",
-  ]
-  include_dirs = [
-    "//v8",
-    "//v8/include",
-  ]
-
-  public_deps = [
-    "//v8",
-  ]
 }
 
 static_library("formfiller") {
   sources = [
     "fpdfsdk/include/formfiller/FFL_CBA_Fontmap.h",
     "fpdfsdk/include/formfiller/FFL_CheckBox.h",
     "fpdfsdk/include/formfiller/FFL_ComboBox.h",
     "fpdfsdk/include/formfiller/FFL_FormFiller.h",
     "fpdfsdk/include/formfiller/FFL_IFormFiller.h",
     "fpdfsdk/include/formfiller/FFL_ListBox.h",
@@ skipping 51 matching lines @@
   sources = [
     "core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_embeddertest.cpp",
     "core/src/fpdfapi/fpdf_parser/fpdf_parser_parser_embeddertest.cpp",
     "fpdfsdk/src/fpdf_dataavail_embeddertest.cpp",
     "fpdfsdk/src/fpdfdoc_embeddertest.cpp",
     "fpdfsdk/src/fpdfformfill_embeddertest.cpp",
     "fpdfsdk/src/fpdftext_embeddertest.cpp",
     "fpdfsdk/src/fpdfview_c_api_test.c",
     "fpdfsdk/src/fpdfview_c_api_test.h",
     "fpdfsdk/src/fpdfview_embeddertest.cpp",
-    "fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp",
     "testing/embedder_test.cpp",
     "testing/embedder_test.h",
     "testing/embedder_test_mock_delegate.h",
     "testing/embedder_test_timer_handling_delegate.h",
     "testing/fx_string_testhelpers.cpp",
     "testing/fx_string_testhelpers.h",
   ]
   deps = [
     "//testing/gmock",
     "//testing/gtest",
-    "//v8",
-    "//v8:v8_libplatform",
     ":pdfium",
   ]
   include_dirs = [
-    "//v8",
-    "//v8/include",
     "."
   ]
+  if (pdf_enable_v8) {
+    sources += [
+     "fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp"
+    ]
+    deps += [
+      "//v8",
+      "//v8:v8_libplatform",
+    ]
+    include_dirs += [
+      "//v8",
+      "//v8/include",
+    ]
+  }
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     ":pdfium_config",
     "//build/config/compiler:no_chromium_code",
   ]
 }