Fix undefined reference errors in input_method_engine.cc for Chrome OS build.

BUG=none
TEST=emrege=${BOARD} chromeos-chrome


Review URL: http://codereview.chromium.org/7324020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@91812 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/input_method/ibus_keymap.cc

@@ -8,6 +8,9 @@
 #include <ibus.h>
 #endif
 
+namespace chromeos {
+namespace input_method {
+
 #if defined(HAVE_IBUS)
 std::string GetIBusKey(int keyval) {
   // TODO: Ensure all keys are supported.
@@ -86,3 +89,6 @@ std::string GetIBusKeyCode(int keyval, int keycode) {
   return "";
 }
 #endif // HAVE_IBUS
+
+}  // namespace input_method
+}  // namespace chromeos