Implement sync of keyboard layout between Ozone and Wayland clients

ash/system/tray_caps_lock.h

Index: ash/system/tray_caps_lock.h
diff --git a/ash/system/tray_caps_lock.h b/ash/system/tray_caps_lock.h
index 8c86411b585723734f1e50dbcc0d68fe6022a9fe..d6ec7ece5b9d787a1a30b69137341eca03d9fba6 100644
--- a/ash/system/tray_caps_lock.h
+++ b/ash/system/tray_caps_lock.h
@@ -27,6 +27,9 @@ class TrayCapsLock : public TrayImageItem,
   // Overriden from chromeos::input_method::ImeKeyboard::Observer:
   void OnCapsLockChanged(bool enabled) override;
 
+  // input_method::ImeKeyboard::Observer: we are not interested in layout:

[reveman, 2017/06/09 14:53:17]

Simply "// Overridden from input_method::ImeKeyboard::Observer:" as I don't
think the comment adds anything. If needed then put on the next line.

[jclinton, 2017/06/09 16:36:02]

Done.

+  void OnLayoutChanged(const std::string& layout_name) override{};

[reveman, 2017/06/09 14:53:17]

nit: s/override{};/override {}/

[jclinton, 2017/06/09 16:36:02]

Done.

+
   // Overridden from TrayImageItem.
   bool GetInitialVisibility() override;
   views::View* CreateDefaultView(LoginStatus status) override;