Expose FS show/hide thresholds to Command Line

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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 "content/renderer/gpu/render_widget_compositor.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/time.h"
@@ skipping 103 matching lines @@
   settings.compositorFrameMessage =
       cmd->HasSwitch(cc::switches::kEnableCompositorFrameMessage);
 
   if (settings.calculateTopControlsPosition &&
       (settings.topControlsHeight <= 0 || !settings.compositorFrameMessage)) {
     DCHECK(false) << "Top controls repositioning enabled without valid height "
                      "or compositorFrameMessage set.";
     settings.calculateTopControlsPosition = false;
   }
 
+  if (cmd->HasSwitch(cc::switches::kTopControlsShowThreshold)) {
+      std::string top_threshold_str =
+          cmd->GetSwitchValueASCII(cc::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 (cmd->HasSwitch(cc::switches::kTopControlsHideThreshold)) {
+      std::string top_threshold_str =
+          cmd->GetSwitchValueASCII(cc::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;
+  }
+
   settings.partialSwapEnabled =
       cmd->HasSwitch(cc::switches::kEnablePartialSwap);
   settings.backgroundColorInsteadOfCheckerboard =
       cmd->HasSwitch(cc::switches::kBackgroundColorInsteadOfCheckerboard);
   settings.showOverdrawInTracing =
       cmd->HasSwitch(cc::switches::kTraceOverdraw);
 
   settings.initialDebugState.showFPSCounter = web_settings.showFPSCounter;
   settings.initialDebugState.showPaintRects = web_settings.showPaintRects;
   settings.initialDebugState.showPlatformLayerTree =
@@ skipping 282 matching lines @@
   widget_->didCompleteSwapBuffers();
 }
 
 // TODO(jamesr): This goes through WebViewImpl just to do suppression, refactor
 // that piece out.
 void RenderWidgetCompositor::scheduleComposite() {
   client_->scheduleComposite();
 }
 
 }  // namespace content