Redesign display options for ChromeOS.

ash/display/display_manager.h

 // 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.
 
 #ifndef ASH_DISPLAY_DISPLAY_MANAGER_H_
 #define ASH_DISPLAY_DISPLAY_MANAGER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 21 matching lines @@
 // DisplayManager maintains the current display configurations,
 // and notifies observers when configuration changes.
 // This is exported for unittest.
 //
 // TODO(oshima): Make this non internal.
 class ASH_EXPORT DisplayManager : public aura::RootWindowObserver {
  public:
   DisplayManager();
   virtual ~DisplayManager();
 
+  // Returns the list of possible UI scales for the display.
+  static std::vector<float> GetScalesForDisplay(const DisplayInfo& info);
+
   // Returns next valid UI scale.
   static float GetNextUIScale(const DisplayInfo& info, bool up);
 
   // When set to true, the MonitorManager calls OnDisplayBoundsChanged
   // even if the display's bounds didn't change. Used to swap primary
   // display.
   void set_force_bounds_changed(bool force_bounds_changed) {
     force_bounds_changed_ = force_bounds_changed;
   }
 
@@ skipping 175 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(DisplayManager);
 };
 
 extern const aura::WindowProperty<int64>* const kDisplayIdKey;
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_DISPLAY_MANAGER_H_