ash: Add basic prediction code to the laser pointer.

ash/common/ash_switches.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 "ash/common/ash_switches.h"
 
 #include "base/command_line.h"
 #include "base/sys_info.h"
 
 namespace ash {
@@ skipping 47 matching lines @@
 // Enables docking windows to the right or left (not to be confused with snapped
 // windows).
 const char kAshEnableDockedWindows[] = "ash-enable-docked-windows";
 
 // Enables the observation of accelerometer events to enter touch-view mode.
 const char kAshEnableTouchView[] = "enable-touchview";
 
 // Enables mirrored screen.
 const char kAshEnableMirroredScreen[] = "ash-enable-mirrored-screen";
 
+// Specifies the estimated time (in milliseconds) from VSYNC event until when
+// visible light can be noticed by the user.
+const char kAshEstimatedPresentationDelay[] = "estimated-presentation-delay";

[Daniel Erat, 2017/03/16 16:50:55]

should this start with "ash-" like (most of) the existing flags?

[reveman, 2017/03/16 18:00:24]

Done.

+
 // Enables the palette next to the status area.
 const char kAshForceEnablePalette[] = "ash-force-enable-palette";
 
 // Hides notifications that are irrelevant to Chrome OS device factory testing,
 // such as battery level updates.
 const char kAshHideNotificationsForFactory[] =
     "ash-hide-notifications-for-factory";
 
 // Enables the shelf color to be derived from the wallpaper.
 const char kAshShelfColor[] = "ash-shelf-color";
@@ skipping 22 matching lines @@
              kAshConstrainPointerToRoot);
 }
 
 bool DockedWindowsEnabled() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       ash::switches::kAshEnableDockedWindows);
 }
 
 }  // namespace switches
 }  // namespace ash