Initialize V8 in PDFium from external files (in-renderer process only).

content/renderer/pepper/pepper_plugin_instance_impl.h

Index: content/renderer/pepper/pepper_plugin_instance_impl.h
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.h b/content/renderer/pepper/pepper_plugin_instance_impl.h
index 5389a8be4a323b4c32c8581f978d5751e6522aa6..084682778e139c7cae9f207cec04eb673f8dab47 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.h
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.h
@@ -383,6 +383,12 @@ class CONTENT_EXPORT PepperPluginInstanceImpl
   void SetLinkUnderCursor(const std::string& url) override;
   void SetTextInputType(ui::TextInputType type) override;
   void PostMessageToJavaScript(PP_Var message) override;
+#if !defined(OS_ANDROID) && defined(V8_USE_EXTERNAL_STARTUP_DATA)
+  const char* GetV8NativesData() const override;
+  const char* GetV8SnapshotData() const override;
+  int GetV8NativesSize() const override;
+  int GetV8SnapshotSize() const override;
+#endif  // !defined(OS_ANDROID) && defined(V8_USE_EXTERNAL_STARTUP_DATA)
 
   // PPB_Instance_API implementation.
   PP_Bool BindGraphics(PP_Instance instance, PP_Resource device) override;