Implement sync of keyboard layout between Ozone and Wayland clients

ui/base/ime/chromeos/ime_keyboard_unittest.cc

+// Copyright 2017 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 "base/logging.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/ime/chromeos/fake_ime_keyboard.h"
+#include "ui/base/ime/chromeos/ime_keyboard.h"
+
+namespace chromeos {
+namespace input_method {
+
+namespace {
+
+class ImeKeyboardTest : public testing::Test,
+                        public ImeKeyboard::Observer {
+ public:
+  void SetUp() override {
+    xkey_.reset(new FakeImeKeyboard());
+    xkey_->AddObserver(this);
+    caps_changed_ = false;
+  }
+  void TearDown() override {
+    xkey_->RemoveObserver(this);
+    xkey_.reset();
+  }
+  void OnCapsLockChanged(bool enabled) override {
+    caps_changed_ = true;
+  }
+  void OnLayoutChanging(const std::string& layout_name) override {
+    layout_changed_ = true;
+  }
+  void VerifyCapsLockChanged(bool changed) {
+    EXPECT_EQ(changed, caps_changed_);
+    caps_changed_ = false;
+  }
+  void VerifyLayoutChanged(bool changed) {
+    EXPECT_EQ(changed, layout_changed_);
+    layout_changed_ = false;
+  }
+  std::unique_ptr<ImeKeyboard> xkey_;
+  bool caps_changed_;
+  bool layout_changed_;
+};
+
+// Tests CheckLayoutName() function.
+TEST_F(ImeKeyboardTest, TestObserver) {
+  xkey_->SetCapsLockEnabled(true);
+  VerifyCapsLockChanged(true);
+  xkey_->SetCurrentKeyboardLayoutByName("foo");
+  VerifyLayoutChanged(true);
+}
+
+}  // namespace
+
+}  // namespace input_method
+}  // namespace chromeos