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 90 matching lines @@
                                        intptr_t old) OVERRIDE {
     using aura::client::kShowStateKey;
     if (key == kShowStateKey) {
       // Disable immersive mode when leaving the fullscreen state.
       if (window->GetProperty(kShowStateKey) != ui::SHOW_STATE_FULLSCREEN)
         controller_->SetEnabled(false);
       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();
+      }
+      return;
+    }
   }
 
  private:
   ImmersiveModeControllerAsh* controller_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(WindowObserver);
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 
@@ skipping 481 matching lines @@
   if (reveal_state_ == SLIDING_CLOSED) {
     reveal_state_ = CLOSED;
     TopContainerView* top_container = browser_view_->top_container();
     // Layer isn't needed after animation completes.
     top_container->SetFillsBoundsOpaquely(false);
     top_container->SetPaintToLayer(false);
     // Update tabstrip for closed state.
     LayoutBrowserView(true);
   }
 }