Do not release capture when starting a move loop on Desktop Linux

chrome/browser/ui/views/tabs/tab_drag_controller.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_DRAG_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_DRAG_CONTROLLER_H_
 
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 443 matching lines @@
 
   // The screen that this drag is associated with. Cached, because other UI
   // elements are NULLd at various points during the lifetime of this object.
   gfx::Screen* screen_;
 
   // The desktop type that this drag is associated with. Cached, because other
   // UI elements are NULLd at various points during the lifetime of this
   // object.
   chrome::HostDesktopType host_desktop_type_;
 
-  // Aura mouse capture and release is used on Ash platforms as well as on
-  // Linux to ensure that pointer grab is not released prematurely.
-  bool use_aura_capture_policy_;
+  // Whether capture can be released during the drag. When false, capture should
+  // not be released when transferring capture between widgets and when starting
+  // the move loop.
+  bool can_release_capture_;
 
   // The position of the mouse (in screen coordinates) at the start of the drag
   // operation. This is used to calculate minimum elasticity before a
   // DraggedTabView is constructed.
   gfx::Point start_point_in_screen_;
 
   // This is the offset of the mouse from the top left of the first Tab where
   // dragging began. This is used to ensure that the dragged view is always
   // positioned at the correct location during the drag, and to ensure that the
   // detached window is created at the right location.
@@ skipping 110 matching lines @@
   int attach_index_;
 
   scoped_ptr<ui::EventHandler> escape_tracker_;
 
   base::WeakPtrFactory<TabDragController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TabDragController);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_DRAG_CONTROLLER_H_