Clean Up: Remove ibus namespace.

chromeos/dbus/ibus/ibus_lookup_table_unittest.cc

Index: chromeos/dbus/ibus/ibus_lookup_table_unittest.cc
diff --git a/chromeos/dbus/ibus/ibus_lookup_table_unittest.cc b/chromeos/dbus/ibus/ibus_lookup_table_unittest.cc
index 066cc96626d227213ee6d5ba6d2af58e35533d1d..49384004545e71525c997d4763c872c876a6c08b 100644
--- a/chromeos/dbus/ibus/ibus_lookup_table_unittest.cc
+++ b/chromeos/dbus/ibus/ibus_lookup_table_unittest.cc
@@ -17,8 +17,6 @@
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chromeos {
-// TODO(nona): Remove ibus namespace after complete libibus removal.
-namespace ibus {
 
 TEST(IBusLookupTable, WriteReadTest) {
   const char kSampleText1[] = "Sample Text 1";
@@ -321,5 +319,4 @@ TEST(IBusLookupTable, CopyFromTest) {
   table2.CopyFrom(table1);
   EXPECT_TRUE(table1.IsEqual(table2));
 }
-}  // namespace ibus
 }  // namespace chromeos