Move functions for controlling Caps Lock to CapsLockDelegate from SystemTrayDelegate.

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index c6eb4d3773eaa1c164691ccd596b751986f9b65e..d4baf4e5fe47055c4f486a21adb303a345daee61 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -9,6 +9,7 @@
 
 #include "ash/accelerators/focus_manager_factory.h"
 #include "ash/ash_switches.h"
+#include "ash/caps_lock_delegate_stub.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/desktop_background/desktop_background_resources.h"
 #include "ash/desktop_background/desktop_background_view.h"
@@ -17,6 +18,7 @@
 #include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/launcher/launcher.h"
 #include "ash/magnifier/magnification_controller.h"
+#include "ash/caps_lock_delegate.h"
 #include "ash/display/display_controller.h"
 #include "ash/display/mouse_cursor_event_filter.h"
 #include "ash/display/multi_display_manager.h"
@@ -452,6 +454,12 @@ void Shell::Init() {
 
   InitRootWindowController(root_window_controller);
 
+  // StatusAreaWidget uses Shell's CapsLockDelegate.
+  if (delegate_.get())
+    caps_lock_delegate_.reset(delegate_->CreateCapsLockDelegate());
+  else
+    caps_lock_delegate_.reset(new CapsLockDelegateStub);
+
   // Initialize Primary RootWindow specific items.
   status_area_widget_ = new internal::StatusAreaWidget();
   status_area_widget_->CreateTrayViews(delegate_.get());