Windows: Make it possible to print text with GDI.

printing/printing_context.cc

Index: printing/printing_context.cc
diff --git a/printing/printing_context.cc b/printing/printing_context.cc
index 5187ceed373f1b2654d76de09912db8b2bd9735a..8bfd8b73db3c76cfe10b234a4bd381f5b39a892b 100644
--- a/printing/printing_context.cc
+++ b/printing/printing_context.cc
@@ -33,6 +33,12 @@ void PrintingContext::set_margin_type(MarginType type) {
   settings_.set_margin_type(type);
 }
 
+void PrintingContext::set_is_modifiable(bool is_modifiable) {
+#if defined(OS_WIN)
+  settings_.set_print_text_with_gdi(is_modifiable);
+#endif
+}
+
 void PrintingContext::ResetSettings() {
   ReleaseContext();