Read compositor VSync information from platform, when possible

chrome/browser/ui/webui/options/chromeos/display_options_handler.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/webui/options/chromeos/display_options_handler.h"
 
 #include <string>
 
 #include "ash/display/display_controller.h"
 #include "ash/display/display_manager.h"
@@ skipping 185 matching lines @@
       if (display_info.rotation() == gfx::Display::ROTATE_90 ||
           display_info.rotation() == gfx::Display::ROTATE_270) {
         float tmp = base_size.width();
         base_size.set_width(base_size.height());
         base_size.set_height(tmp);
       }
       for (size_t i = 0; i < ui_scales.size(); ++i) {
         gfx::SizeF new_size = base_size;
         new_size.Scale(ui_scales[i]);
         resolutions.push_back(ash::internal::Resolution(
-            gfx::ToFlooredSize(new_size), false /* interlaced */));
+            gfx::ToFlooredSize(new_size), -1.0f, false /* interlaced */));
       }
     } else {
       for (size_t i = 0; i < display_info.resolutions().size(); ++i)
         resolutions.push_back(display_info.resolutions()[i]);
     }
     std::sort(resolutions.begin(), resolutions.end(), CompareResolution);
 
     base::ListValue* js_resolutions = new base::ListValue();
     gfx::Size current_size = display_info.bounds_in_native().size();
     gfx::Insets current_overscan = display_info.GetOverscanInsetsInPixel();
@@ skipping 179 matching lines @@
   else if (rotation_value == "270")
     new_rotation = gfx::Display::ROTATE_270;
   else if (rotation_value != "0")
     LOG(ERROR) << "Invalid rotation: " << rotation_value << " Falls back to 0";
 
   GetDisplayManager()->SetDisplayRotation(display_id, new_rotation);
 }
 
 }  // namespace options
 }  // namespace chromeos