Fixing caps lock problems under ChromeOS where the tray does not properly follow the real caps lock…

chromeos/ime/fake_xkeyboard.cc

Index: chromeos/ime/fake_xkeyboard.cc
diff --git a/chromeos/ime/fake_xkeyboard.cc b/chromeos/ime/fake_xkeyboard.cc
index 6a7d7a4158d9a1734ef991acdf53ad2779ea10ee..fdc227a656ec2ccb3950f869c68de32b604d7ae3 100644
--- a/chromeos/ime/fake_xkeyboard.cc
+++ b/chromeos/ime/fake_xkeyboard.cc
@@ -13,6 +13,12 @@ FakeXKeyboard::FakeXKeyboard()
       auto_repeat_is_enabled_(false) {
 }
 
+void FakeXKeyboard::AddObserver(XKeyboard::Observer* observer) {
+}
+
+void FakeXKeyboard::RemoveObserver(XKeyboard::Observer* observer) {
+}
+
 bool FakeXKeyboard::SetCurrentKeyboardLayoutByName(
     const std::string& layout_name) {
   ++set_current_keyboard_layout_by_name_count_;