Use float literals to decide when to blacklist low scaling factors

chrome/browser/ui/libgtk2ui/gtk2_ui.cc

Index: chrome/browser/ui/libgtk2ui/gtk2_ui.cc
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_ui.cc b/chrome/browser/ui/libgtk2ui/gtk2_ui.cc
index f3e98fc104a82714fb25abd23b71aa573749654b..cc4c6b8c0df87a758e5bfaed5e10ba228e1e7472 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_ui.cc
+++ b/chrome/browser/ui/libgtk2ui/gtk2_ui.cc
@@ -1352,10 +1352,10 @@ float Gtk2UI::GetDeviceScaleFactor() const {
     return gfx::Display::GetForcedDeviceScaleFactor();
   const int kCSSDefaultDPI = 96;
   const float scale = GetDPI() / kCSSDefaultDPI;
-  // Round to 1 decimal, e.g. to 1.4.
-  const float rounded = roundf(scale * 10) / 10;
-  // See crbug.com/484400
-  return rounded < 1.3 ? 1.0 : rounded;
+
+  // Blacklist scaling factors <130% (crbug.com/484400) and round
+  // to 1 decimal to prevent rendering problems (crbug.com/485183).
+  return scale < 1.3f ? 1.0f : roundf(scale * 10) / 10;
 }
 
 }  // namespace libgtk2ui