Allow 1.2 scale factor on linux

chrome/browser/ui/libgtkui/gtk_ui.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/libgtkui/gtk_ui.h"
 
 #include <math.h>
 #include <pango/pango.h>
 #include <X11/Xcursor/Xcursor.h>
 
@@ skipping 1036 matching lines @@
 void Gtk2UI::ResetStyle() {
   LoadGtkValues();
   NativeThemeGtk2::instance()->NotifyObservers();
 }
 
 void Gtk2UI::UpdateDeviceScaleFactor() {
   // Note: Linux chrome currently does not support dynamic DPI
   // changes.  This is to allow flags to override the DPI settings
   // during startup.
   float scale = GetRawDeviceScaleFactor();
-
-  // Blacklist scaling factors <130% (crbug.com/484400) and round
+  // Blacklist scaling factors <120% (crbug.com/484400) and round
   // to 1 decimal to prevent rendering problems (crbug.com/485183).
-  device_scale_factor_ = scale < 1.3f ? 1.0f : roundf(scale * 10) / 10;
+  device_scale_factor_ = scale < 1.2f ? 1.0f : roundf(scale * 10) / 10;
   UpdateDefaultFont();
 }
 
 float Gtk2UI::GetDeviceScaleFactor() const {
   return device_scale_factor_;
 }
 
 }  // namespace libgtkui
 
 views::LinuxUI* BuildGtk2UI() {
   return new libgtkui::Gtk2UI;
 }