Font size in DomDistiller prefs syncs with local scaling

components/dom_distiller/core/viewer.cc

Index: components/dom_distiller/core/viewer.cc
diff --git a/components/dom_distiller/core/viewer.cc b/components/dom_distiller/core/viewer.cc
index 4f04332e3d44748c8b56837ccf1f7d911c92393c..db85d065d4485ec5dc4c86648c2b172d1155ff75 100644
--- a/components/dom_distiller/core/viewer.cc
+++ b/components/dom_distiller/core/viewer.cc
@@ -10,6 +10,7 @@
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram_macros.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "components/dom_distiller/core/distilled_page_prefs.h"
 #include "components/dom_distiller/core/dom_distiller_service.h"
@@ -306,6 +307,10 @@ const std::string GetDistilledPageFontFamilyJs(
   return "useFontFamily('" + GetJsFontFamily(font_family) + "');";
 }
 
+const std::string GetDistilledPageFontScalingJs(float scaling) {
+  return "useFontScaling(" + base::DoubleToString(scaling) + ");";
+}
+
 }  // namespace viewer
 
 }  // namespace dom_distiller