[Chrome] Support NumCopies print preset

pdf/instance.cc

Index: pdf/instance.cc
diff --git a/pdf/instance.cc b/pdf/instance.cc
index fb8484fdbe748f39930ecdd6255f856dd423a927..a0feb5666545129bce5aa599f1721bd5abe4be36 100644
--- a/pdf/instance.cc
+++ b/pdf/instance.cc
@@ -217,9 +217,21 @@ void Transform(PP_Instance instance, PP_PrivatePageTransformType type) {
   }
 }
 
+PP_Bool GetPrintPresetOptionsFromDocument(
+    PP_Instance instance,
+    PP_PdfPrintPresetOptions_Dev* options) {
+  void* object = pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
+  if (object) {
+    Instance* obj_instance = static_cast<Instance*>(object);
+    obj_instance->GetPrintPresetOptionsFromDocument(options);
+  }
+  return PP_TRUE;
+}
+
 const PPP_Pdf ppp_private = {
   &GetLinkAtPosition,
-  &Transform
+  &Transform,
+  &GetPrintPresetOptionsFromDocument
 };
 
 int ExtractPrintPreviewPageIndex(const std::string& src_url) {
@@ -671,6 +683,12 @@ pp::Var Instance::GetInstanceObject() {
   return instance_object_;
 }
 
+void Instance::GetPrintPresetOptionsFromDocument(
+    PP_PdfPrintPresetOptions_Dev* options) {
+  options->is_scaling_disabled = PP_FromBool(IsPrintScalingDisabled());
+  options->copies = engine_->GetCopiesToPrint();
+}
+
 pp::Var Instance::GetLinkAtPosition(const pp::Point& point) {
   pp::Point offset_point(point);
   ScalePoint(device_scale_, &offset_point);