Expose FS show/hide thresholds to Command Line

cc/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 "cc/switches.h"
 
 namespace cc {
 namespace switches {
 
 // On platforms where checkerboards are used, prefer background colors instead
@@ skipping 15 matching lines @@
 
 // Try to finish display pipeline before vsync tick
 const char kEnableRightAlignedScheduling[] = "enable-right-aligned-scheduling";
 
 const char kEnableTopControlsPositionCalculation[] =
     "enable-top-controls-position-calculation";
 
 // The height of the movable top controls.
 const char kTopControlsHeight[] = "top-controls-height";
 
+// Percentage of the top controls need to be hidden before they will auto hide.
+const char kTopControlsHideThreshold[] = "top-controls-hide-threshold";
+
+// Percentage of the top controls need to be shown before they will auto show.
+const char kTopControlsShowThreshold[] = "top-controls-show-threshold";
+
 // Number of worker threads used to rasterize content.
 const char kNumRasterThreads[] = "num-raster-threads";
 
 // Show rects in the HUD around layers whose properties have changed.
 const char kShowPropertyChangedRects[] = "show-property-changed-rects";
 
 // Show rects in the HUD around damage as it is recorded into each render
 // surface.
 const char kShowSurfaceDamageRects[] = "show-surface-damage-rects";
 
@@ skipping 20 matching lines @@
 // Re-rasters everything multiple times to simulate a much slower machine.
 // Give a scale factor to cause raster to take that many times longer to
 // complete, such as --slow-down-raster-scale-factor=25.
 const char kSlowDownRasterScaleFactor[] = "slow-down-raster-scale-factor";
 
 // Schedule rasterization jobs according to their estimated processing cost.
 const char kUseCheapnessEstimator[] = "use-cheapness-estimator";
 
 }  // namespace switches
 }  // namespace cc