Add translate client mock.

components/translate/core/browser/mock_translate_client.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 <memory>
+
+#include "components/translate/core/browser/mock_translate_client.h"
+#include "components/translate/core/browser/translate_prefs.h"
+
+namespace translate {
+
+#if defined(OS_CHROMEOS)
+const char* preferred_languages_prefs = "settings.language.preferred_languages";
+#else
+const char* preferred_languages_prefs = NULL;

[napper, 2017/05/30 06:24:35]

nullptr

[Leo, 2017/05/31 01:38:26]

Acknowledged.

+#endif
+const char* accept_languages_prefs = "intl.accept_languages";
+
+namespace testing {
+MockTranslateClient::MockTranslateClient(TranslateDriver* driver,
+                                         PrefService* prefs)
+    : driver_(driver), prefs_(prefs) {}
+
+MockTranslateClient::~MockTranslateClient() {}
+
+TranslateDriver* MockTranslateClient::GetTranslateDriver() {

[napper, 2017/05/30 06:24:35]

Can these be inline?

[Leo, 2017/05/31 01:38:25]

I did write them inline. But "git cl format" prefers the current format.

+  return driver_;
+}
+
+PrefService* MockTranslateClient::GetPrefs() {
+  return prefs_;
+}
+
+std::unique_ptr<TranslatePrefs> MockTranslateClient::GetTranslatePrefs() {
+  return base::MakeUnique<TranslatePrefs>(prefs_, accept_languages_prefs,
+                                          preferred_languages_prefs);
+}
+
+#if !defined(USE_AURA)

[napper, 2017/05/30 06:24:35]

remove

[Leo, 2017/05/31 01:38:26]

Thanks for the catch.

+#endif
+
+}  // namespace testing
+}  // namespace translate