Use ICU for string pluralization in the extension permission dialog.

chrome/common/extensions/permissions/permissions_data_unittest.cc

Index: chrome/common/extensions/permissions/permissions_data_unittest.cc
diff --git a/chrome/common/extensions/permissions/permissions_data_unittest.cc b/chrome/common/extensions/permissions/permissions_data_unittest.cc
index 821f64e90c84388c3714648e0dff7169d0b8d2de..a5dddbfa7ac83199506d0cfa25659b3056acf5ae 100644
--- a/chrome/common/extensions/permissions/permissions_data_unittest.cc
+++ b/chrome/common/extensions/permissions/permissions_data_unittest.cc
@@ -175,7 +175,7 @@ TEST(ExtensionPermissionsTest, GetPermissionMessages_ManyHostsPermissions) {
       PermissionsData::GetPermissionMessageDetailsStrings(extension.get());
   ASSERT_EQ(1u, warnings.size());
   ASSERT_EQ(1u, warnings_details.size());
-  EXPECT_EQ("Access your data on 5 website(s)", UTF16ToUTF8(warnings[0]));
+  EXPECT_EQ("Access your data on 5 websites", UTF16ToUTF8(warnings[0]));
   EXPECT_EQ("- www.a.com\n- www.b.com\n- www.c.com\n- www.d.com\n- www.e.com",
             UTF16ToUTF8(warnings_details[0]));
 }