Expose FS show/hide thresholds to Command Line

webkit/compositor_bindings/web_layer_tree_view_impl.cc

Index: webkit/compositor_bindings/web_layer_tree_view_impl.cc
diff --git a/webkit/compositor_bindings/web_layer_tree_view_impl.cc b/webkit/compositor_bindings/web_layer_tree_view_impl.cc
index f8e8d54ded61dfbd165686219a45d78347710f25..ed21705ab7ff93a48e989c161b53b033dcdbb77e 100644
--- a/webkit/compositor_bindings/web_layer_tree_view_impl.cc
+++ b/webkit/compositor_bindings/web_layer_tree_view_impl.cc
@@ -64,6 +64,23 @@ bool WebLayerTreeViewImpl::initialize(const WebLayerTreeView::Settings& webSetti
         if (base::StringToDouble(controls_height_str, &controls_height) && controls_height > 0)
             settings.topControlsHeight = controls_height;
     }
+
+    if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kTopControlsShowThreshold)) {
+        std::string top_threshold_str(
+            CommandLine::ForCurrentProcess()->GetSwitchValueASCII(switches::kTopControlsShowThreshold));
+        double show_threshold;
+        if (base::StringToDouble(top_threshold_str, &show_threshold) && show_threshold >= 0.f && show_threshold <= 1.f)
+            settings.topControlsShowThreshold = show_threshold;
+    }
+
+    if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kTopControlsHideThreshold)) {
+        std::string top_threshold_str(
+            CommandLine::ForCurrentProcess()->GetSwitchValueASCII(switches::kTopControlsHideThreshold));
+        double hide_threshold;
+        if (base::StringToDouble(top_threshold_str, &hide_threshold) && hide_threshold >= 0.f && hide_threshold <= 1.f)
+            settings.topControlsHideThreshold = hide_threshold;
+    }
+
     if (settings.calculateTopControlsPosition && (settings.topControlsHeight <= 0 || !settings.compositorFrameMessage)) {
         DCHECK(false) << "Top controls repositioning enabled without valid height or compositorFrameMessage set.";
         settings.calculateTopControlsPosition = false;