Add in gesture for immersive mode

chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc

 // Copyright 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/views/frame/immersive_mode_controller_ash.h"
 
 #include "ash/ash_switches.h"
 #include "ash/shell.h"
 #include "ash/wm/window_properties.h"
 #include "base/command_line.h"
@@ skipping 289 matching lines @@
         controller_->browser_view_->FullScreenStateChanged();
       }
       return;
     }
     using ash::internal::kImmersiveModeKey;
     if (key == kImmersiveModeKey) {
       // Another component has toggled immersive mode.
       controller_->SetEnabled(window->GetProperty(kImmersiveModeKey));
       return;
     }
+    using ash::internal::kPendingImmersiveGestureKey;
+    if (key == kPendingImmersiveGestureKey) {
+      if (window->GetProperty(kPendingImmersiveGestureKey)) {
+        window->SetProperty(kPendingImmersiveGestureKey, false);
+        controller_->MaybeStartReveal(ANIMATE_FAST);
+      }
+      return;
+    }
   }
 
  private:
   ImmersiveModeControllerAsh* controller_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(WindowObserver);
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 
@@ skipping 518 matching lines @@
   ui::ScopedLayerAnimationSettings settings(layer->GetAnimator());
   settings.SetTweenType(ui::Tween::EASE_OUT);
   settings.SetTransitionDuration(
       base::TimeDelta::FromMilliseconds(duration_ms));
   settings.SetPreemptionStrategy(
       ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
   if (observer)
     settings.AddObserver(observer);
   layer->SetTransform(target_transform);
 }