Reland of Force U.S. English keyboard layout for TextfieldTest.KeysWithModifiersTest

ui/events/test/keyboard_layout_win.cc

+// Copyright 2016 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 "ui/events/test/keyboard_layout.h"
+
+#include "base/logging.h"
+
+namespace ui {
+
+// |LoadKeyboardLayout()| ensures the locale to be loaded into the system
+// (Similar to temporarily adding a locale in Control Panel), otherwise
+// |ToUnicodeEx()| will fall-back to the default locale.
+// See MSDN LoadKeyboardLayout():
+// https://msdn.microsoft.com/en-us/library/windows/desktop/ms646305(v=vs.85).aspx
+// And language constants and strings:
+// https://msdn.microsoft.com/en-us/library/windows/desktop/dd318693(v=vs.85).aspx
+PlatformKeyboardLayout GetPlatformKeyboardLayout(KeyboardLayout layout) {
+  switch (layout) {
+    case KEYBOARD_LAYOUT_ENGLISH_US:
+      return LoadKeyboardLayout(L"00000409", KLF_ACTIVATE);
+    case KEYBOARD_LAYOUT_FRENCH:
+      return LoadKeyboardLayout(L"0000040c", KLF_ACTIVATE);
+    case KEYBOARD_LAYOUT_GERMAN:
+      return LoadKeyboardLayout(L"00000407", KLF_ACTIVATE);
+    case KEYBOARD_LAYOUT_GREEK:
+      return LoadKeyboardLayout(L"00000408", KLF_ACTIVATE);
+    case KEYBOARD_LAYOUT_JAPANESE:
+      return LoadKeyboardLayout(L"00000411", KLF_ACTIVATE);
+    case KEYBOARD_LAYOUT_KOREAN:
+      return LoadKeyboardLayout(L"00000412", KLF_ACTIVATE);
+    case KEYBOARD_LAYOUT_RUSSIAN:
+      return LoadKeyboardLayout(L"00000419", KLF_ACTIVATE);
+  }
+
+  NOTREACHED();
+  return 0;
+}
+
+PlatformKeyboardLayout ScopedKeyboardLayout::GetActiveLayout() {
+  return GetKeyboardLayout(0);
+}
+
+void ScopedKeyboardLayout::ActivateLayout(PlatformKeyboardLayout layout) {
+  DCHECK(layout);
+  HKL result = ActivateKeyboardLayout(layout, 0);
+  DCHECK(!!result);
+}
+
+}  // namespace ui