Add window manager component.

wm/host/foreign_test_window_host_linux.h

Index: wm/host/foreign_test_window_host_linux.h
diff --git a/wm/host/foreign_test_window_host_linux.h b/wm/host/foreign_test_window_host_linux.h
new file mode 100644
index 0000000000000000000000000000000000000000..11df0ef6ad658175b1cb6fc6e48ad11b06f82c5c
--- /dev/null
+++ b/wm/host/foreign_test_window_host_linux.h
@@ -0,0 +1,60 @@
+// Copyright (c) 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 WM_HOST_FOREIGN_TEST_WINDOW_HOST_LINUX_H_
+#define WM_HOST_FOREIGN_TEST_WINDOW_HOST_LINUX_H_
+
+#include <X11/Xlib.h>
+
+// Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
+#undef RootWindow
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/message_loop.h"
+#include "ui/gfx/size.h"
+#include "wm/host/foreign_test_window_host.h"
+
+namespace wm {
+
+class ForeignTestWindowHostLinux : public ForeignTestWindowHost,
+                                   public MessageLoopForIO::Watcher {
+ public:
+  explicit ForeignTestWindowHostLinux(aura::RootWindow* root_window);
+
+  // Overridden from ForeignTestWindowHost:
+  virtual void Initialize() OVERRIDE;
+  virtual void Delete() OVERRIDE;
+  virtual void Show() OVERRIDE;
+  virtual void Hide() OVERRIDE;
+  virtual void Destroy() OVERRIDE;
+  virtual void Sync() OVERRIDE;
+
+  // Overridden from MessageLoopForIO::Watcher:
+  virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
+  virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
+
+ protected:
+  virtual ~ForeignTestWindowHostLinux();
+
+ private:
+  void ProcessXEvent(XEvent* event);
+  void PumpXEvents();
+
+  // The display and the native X window.
+  Display* display_;
+  ::Window parent_;
+  ::Window window_;
+  gfx::Size size_;
+  XFontStruct* font_info_;
+  ::GC gc_;
+
+  MessageLoopForIO::FileDescriptorWatcher connection_watcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(ForeignTestWindowHostLinux);
+};
+
+}  // namespace wm
+
+#endif  // WM_HOST_FOREIGN_TEST_WINDOW_HOST_LINUX_H_