Remove screen dependency from font_render_params_linux

ui/views/widget/desktop_aura/desktop_screen_x11.h

 // Copyright (c) 2013 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.
 
 #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 53 matching lines @@
   // Constructor used in tests.
   DesktopScreenX11(const std::vector<gfx::Display>& test_displays);
 
   // Builds a list of displays from the current screen information offered by
   // the X server.
   std::vector<gfx::Display> BuildDisplaysFromXRandRInfo();
 
   // We delay updating the display so we can coalesce events.
   void ConfigureTimerFired();
 
+  // Updates |displays_| and sets FontRenderParams's scale factor.
+  void SetDisplaysInternal(const std::vector<gfx::Display>& displays);
+
   Display* xdisplay_;
   ::Window x_root_window_;
 
   // Whether the x server supports the XRandR extension.
   bool has_xrandr_;
 
   // The base of the event numbers used to represent XRandr events used in
   // decoding events regarding output add/remove.
   int xrandr_event_base_;
 
   // The display objects we present to chrome.
   std::vector<gfx::Display> displays_;
 
   // The timer to delay configuring outputs. See also the comments in
   // Dispatch().
   scoped_ptr<base::OneShotTimer> configure_timer_;
 
   gfx::DisplayChangeNotifier change_notifier_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopScreenX11);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_