Add window manager component.

wm/host/foreign_window_host.cc

Index: wm/host/foreign_window_host.cc
diff --git a/wm/host/foreign_window_host.cc b/wm/host/foreign_window_host.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a1d638917c171b141eff2936860989ac8a5332d9
--- /dev/null
+++ b/wm/host/foreign_window_host.cc
@@ -0,0 +1,38 @@
+// 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.
+
+#include "wm/host/foreign_window_host.h"
+
+#include "base/compiler_specific.h"
+
+namespace wm {
+
+namespace {
+
+class ForeignWindowHostImpl : public ForeignWindowHost {
+ public:
+  explicit ForeignWindowHostImpl(gfx::PluginWindowHandle window_handle)
+      : window_handle_(window_handle) {}
+
+  // Overridden from wm::ForeignWindowHost:
+  virtual void SetDelegate(ForeignWindowHostDelegate* delegate) OVERRIDE {}
+  virtual gfx::PluginWindowHandle GetWindowHandle() const OVERRIDE {
+    return window_handle_;
+  }
+  virtual void Close() OVERRIDE {}
+  virtual void OnWindowDestroyed() OVERRIDE {}
+
+ private:
+  gfx::PluginWindowHandle window_handle_;
+};
+
+}  // namespace
+
+// static
+ForeignWindowHost* ForeignWindowHost::Create(
+    gfx::PluginWindowHandle window_handle) {
+  return new ForeignWindowHostImpl(window_handle);
+}
+
+}  // namespace wm