Added test to verify that NTP respects browser language setting.

chrome/browser/ui/search/local_ntp_browsertest.cc

Index: chrome/browser/ui/search/local_ntp_browsertest.cc
diff --git a/chrome/browser/ui/search/local_ntp_browsertest.cc b/chrome/browser/ui/search/local_ntp_browsertest.cc
index ccbc8c42467728f445ef9e4225c7f436d4bd7578..5201abc658c2c00f52d66f7382359e0000d398e8 100644
--- a/chrome/browser/ui/search/local_ntp_browsertest.cc
+++ b/chrome/browser/ui/search/local_ntp_browsertest.cc
@@ -2,12 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/prefs/pref_service.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/browser_process.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/ui/search/instant_test_utils.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/common/url_constants.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/web_contents.h"
+#include "ui/base/resource/resource_bundle.h"
 
 class LocalNTPTest : public InProcessBrowserTest,
                      public InstantTestBase {
@@ -41,3 +47,42 @@ IN_PROC_BROWSER_TEST_F(LocalNTPTest, LocalNTPJavascriptTest) {
   ASSERT_TRUE(GetBoolFromJS(active_tab, "!!runTests()", &success));
   EXPECT_TRUE(success);
 }
+
+// Flaky on Linux Tests bot.
+#if defined(OS_LINUX)
+#define MAYBE_NTPRespectsBrowserLanguageSetting DISABLED_NTPRespectsBrowserLanguageSetting
+#else
+#define MAYBE_NTPRespectsBrowserLanguageSetting NTPRespectsBrowserLanguageSetting
+#endif
+IN_PROC_BROWSER_TEST_F(LocalNTPTest, MAYBE_NTPRespectsBrowserLanguageSetting) {
+  // Make sure the default language is not French.
+  std::string default_locale = g_browser_process->GetApplicationLocale();
+  EXPECT_NE("fr", default_locale);
+
+  // Switch browser language to French.
+  std::string loaded_locale =
+      ui::ResourceBundle::GetSharedInstance().ReloadLocaleResources("fr");
+  EXPECT_EQ("fr", loaded_locale);
+  g_browser_process->SetApplicationLocale(loaded_locale);
+  PrefService* prefs = g_browser_process->local_state();
+  prefs->SetString(prefs::kApplicationLocale, loaded_locale);
+
+  // Setup Instant.
+  ASSERT_NO_FATAL_FAILURE(SetupInstant(browser()));
+
+  // The second argument says to use only the local overlay and NTP.
+  instant()->SetInstantEnabled(false, true);
+  FocusOmniboxAndWaitForInstantNTPSupport();
+
+  // Open a new tab.
+  ui_test_utils::NavigateToURLWithDisposition(
+      browser(),
+      GURL(chrome::kChromeUINewTabURL),
+      NEW_FOREGROUND_TAB,
+      ui_test_utils::BROWSER_TEST_WAIT_FOR_TAB);
+
+  // Verify that the NTP is in French.
+  content::WebContents* active_tab =
+      browser()->tab_strip_model()->GetActiveWebContents();
+  EXPECT_EQ(ASCIIToUTF16("Nouvel onglet"), active_tab->GetTitle());
+}