[WORK_IN_PROGRESS] PDF::Save() fix for out-of-process-pdf.

pdf/out_of_process_instance.cc

Index: pdf/out_of_process_instance.cc
diff --git a/pdf/out_of_process_instance.cc b/pdf/out_of_process_instance.cc
index 6a3a5181974977defb78713bc667e9171dd491f1..3d7ff27e092d188c59d074ee0ed30dc820397a8d 100644
--- a/pdf/out_of_process_instance.cc
+++ b/pdf/out_of_process_instance.cc
@@ -85,6 +85,8 @@ const char kJSGetPasswordCompleteType[] = "getPasswordComplete";
 const char kJSPassword[] = "password";
 // Print (Page -> Plugin)
 const char kJSPrintType[] = "print";
+// Save (Page -> Plugin)
+const char kJSSaveType[] = "save";
 // Go to page (Plugin -> Page)
 const char kJSGoToPageType[] = "goToPage";
 const char kJSPageNumber[] = "page";
@@ -375,6 +377,9 @@ void OutOfProcessInstance::HandleMessage(const pp::Var& message) {
     }
   } else if (type == kJSPrintType) {
     Print();
+  } else if (type == kJSSaveType) {
+    printf("url_: %s\n", url_.c_str());
+    pp::PDF::SaveAs(this, url_);
   } else if (type == kJSResetPrintPreviewModeType &&
              dict.Get(pp::Var(kJSPrintPreviewUrl)).is_string() &&
              dict.Get(pp::Var(kJSPrintPreviewGrayscale)).is_bool() &&