Do not release capture when transferring capture between Chrome windows on Linux

ui/views/widget/desktop_aura/x11_capture_window.h

+// Copyright 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.
+
+#ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_X11_CAPTURE_WINDOW_H_
+#define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_CAPTURE_WINDOW_H_
+
+#include "base/basictypes.h"
+#include "ui/events/platform/platform_event_types.h"
+#include "ui/gfx/x/x11_types.h"
+
+namespace views {
+
+// Wrapper for an X11 window which grabs mouse events whenever a
+// DesktopWindowTreeHostX11 gains capture.
+class X11CaptureWindow {
+ public:
+  X11CaptureWindow();
+  ~X11CaptureWindow();
+
+  XID xwindow() {
+    return xwindow_;
+  }
+
+  // Whether |event| should be dispatched to the X11CaptureWindow's owner.
+  bool CanDispatchEventToOwner(const ui::PlatformEvent& event);
+
+ private:
+  bool captured_;
+  XID xwindow_;
+
+  DISALLOW_COPY_AND_ASSIGN(X11CaptureWindow);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_CAPTURE_WINDOW_H_