[Chrome] Support NumCopies print preset

ppapi/proxy/ppp_pdf_proxy.cc

Index: ppapi/proxy/ppp_pdf_proxy.cc
diff --git a/ppapi/proxy/ppp_pdf_proxy.cc b/ppapi/proxy/ppp_pdf_proxy.cc
index 356b42f0ebdddd253889f2108a966bb5d57a2c62..5e6df232a639c78afdbd7084d345ad556529c694 100644
--- a/ppapi/proxy/ppp_pdf_proxy.cc
+++ b/ppapi/proxy/ppp_pdf_proxy.cc
@@ -25,9 +25,19 @@ void Transform(PP_Instance instance, PP_PrivatePageTransformType type) {
       new PpapiMsg_PPPPdf_Rotate(API_ID_PPP_PDF, instance, clockwise));
 }
 
+PP_Bool GetPrintPresetOptionsFromDocument(PP_Instance instance,
+                                          PP_PrintPresetOptions_Dev* options) {
+  PP_Bool ret = PP_FALSE;
+  HostDispatcher::GetForInstance(instance)
+      ->Send(new PpapiMsg_PPPPdf_PrintPresetOptions(
+          API_ID_PPP_PDF, instance, options, &ret));
+  return ret;
+}
+
 const PPP_Pdf ppp_pdf_interface = {
   &GetLinkAtPosition,
   &Transform,
+  &GetPrintPresetOptionsFromDocument
 };
 #else
 // The NaCl plugin doesn't need the host side interface - stub it out.
@@ -60,6 +70,8 @@ bool PPP_Pdf_Proxy::OnMessageReceived(const IPC::Message& msg) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPP_Pdf_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiMsg_PPPPdf_Rotate, OnPluginMsgRotate)
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPPdf_PrintPresetOptions,
+                        OnPluginMsgPrintPresetOptions)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -73,5 +85,15 @@ void PPP_Pdf_Proxy::OnPluginMsgRotate(PP_Instance instance, bool clockwise) {
     CallWhileUnlocked(ppp_pdf_->Transform, instance, type);
 }
 
+void PPP_Pdf_Proxy::OnPluginMsgPrintPresetOptions(
+    PP_Instance instance,
+    PP_PrintPresetOptions_Dev* options,
+    PP_Bool* result) {
+  if (ppp_pdf_) {
+    *result = CallWhileUnlocked(
+        ppp_pdf_->GetPrintPresetOptionsFromDocument, instance, options);
+  }
+}
+
 }  // namespace proxy
 }  // namespace ppapi