Whitelist virtual keyboard container to process events at login screen

ash/keyboard_controller_proxy_stub.cc

Index: ash/keyboard_controller_proxy_stub.cc
diff --git a/ash/keyboard_controller_proxy_stub.cc b/ash/keyboard_controller_proxy_stub.cc
new file mode 100644
index 0000000000000000000000000000000000000000..caaa3dd8a2e1365201b459722936261f77a61cdc
--- /dev/null
+++ b/ash/keyboard_controller_proxy_stub.cc
@@ -0,0 +1,34 @@
+// 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.
+
+#include "ash/keyboard_controller_proxy_stub.h"
+
+#include "ash/shell.h"
+#include "ui/views/corewm/input_method_event_filter.h"
+
+using namespace content;
+
+namespace ash {
+
+KeyboardControllerProxyStub::KeyboardControllerProxyStub() {
+}
+
+KeyboardControllerProxyStub::~KeyboardControllerProxyStub() {
+}
+
+BrowserContext* KeyboardControllerProxyStub::GetBrowserContext() {
+  return Shell::GetInstance()->browser_context();
+}
+
+ui::InputMethod* KeyboardControllerProxyStub::GetInputMethod() {
+  return Shell::GetInstance()->input_method_filter()->input_method();
+}
+
+void KeyboardControllerProxyStub::RequestAudioInput(
+    WebContents* web_contents,
+    const MediaStreamRequest& request,
+    const MediaResponseCallback& callback) {
+}
+
+}  // namespace ash