Fix windows margin scaling bug

components/printing/renderer/print_web_view_helper.cc

Index: components/printing/renderer/print_web_view_helper.cc
diff --git a/components/printing/renderer/print_web_view_helper.cc b/components/printing/renderer/print_web_view_helper.cc
index 4f49e16676cf1ed35673a569f9a6e75afc4a3c02..8fbc28ebf4054e483f6cfaf9e79ce3ef224a2a6f 100644
--- a/components/printing/renderer/print_web_view_helper.cc
+++ b/components/printing/renderer/print_web_view_helper.cc
@@ -1853,11 +1853,16 @@ void PrintWebViewHelper::PrintPageInternal(
   int dpi = static_cast<int>(params.params.dpi);
   // Calculate the actual page size and content area in dpi.
   if (page_size_in_dpi) {
+    // Windows uses this for the actual page size. We have scaled page size
+    // to get blink to reflow the page, so scale it back to the real size
+    // before returning it.
     *page_size_in_dpi =
         gfx::Size(static_cast<int>(ConvertUnitDouble(page_size.width(),
-                                                     kPointsPerInch, dpi)),
+                                                     kPointsPerInch, dpi) *
+                                   css_scale_factor),
                   static_cast<int>(ConvertUnitDouble(page_size.height(),
-                                                     kPointsPerInch, dpi)));
+                                                     kPointsPerInch, dpi) *
+                                   css_scale_factor));
   }
 
   if (content_area_in_dpi) {