Fixing problem with edge swipe exiting immersive mode

ash/wm/maximize_mode/maximize_mode_window_manager.cc

 // Copyright 2014 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 "ash/wm/maximize_mode/maximize_mode_window_manager.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/maximize_mode/maximize_mode_window_state.h"
@@ skipping 120 matching lines @@
 void MaximizeModeWindowManager::OnTouchEvent(ui::TouchEvent* event) {
   if (event->type() != ui::ET_TOUCH_PRESSED)
     return;
 
   // Find the active window (from the primary screen) to un-fullscreen.
   aura::Window* window = wm::GetActiveWindow();
   if (!window)
     return;
 
   wm::WindowState* window_state = wm::GetWindowState(window);
-  if (!window_state->IsFullscreen())
+  if (!window_state->IsFullscreen() || window_state->immersive_mode())
     return;
 
   // Test that the touch happened in the top or bottom lines.
   int y = event->y();
   if (y >= kLeaveFullScreenAreaHeightInPixel &&
       y < (window->bounds().height() - kLeaveFullScreenAreaHeightInPixel)) {
     return;
   }
 
   // Leave full screen mode.
@@ skipping 115 matching lines @@
     RootWindowController* controller = *iter;
     aura::Window* container = Shell::GetContainer(
         controller->GetRootWindow(), kShellWindowId_DefaultContainer);
     controller->workspace_controller()->SetMaximizeBackdropDelegate(
         scoped_ptr<WorkspaceLayoutManagerDelegate>(
             enable ? new WorkspaceBackdropDelegate(container) : NULL));
   }
 }
 
 }  // namespace ash