Move functions for controlling Caps Lock to CapsLockDelegate from SystemTrayDelegate.

ash/shell/shell_delegate_impl.cc

Index: ash/shell/shell_delegate_impl.cc
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index b7457e640bbb0a7db7b0c4f175e3ad3db35b0c50..e6774c98d89c816826c18cffb4490623b9261969 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -4,6 +4,7 @@
 
 #include "ash/shell/shell_delegate_impl.h"
 
+#include "ash/caps_lock_delegate_stub.h"
 #include "ash/shell/example_factory.h"
 #include "ash/shell/launcher_delegate_impl.h"
 #include "ash/shell/toplevel_window.h"
@@ -123,6 +124,10 @@ ash::UserWallpaperDelegate* ShellDelegateImpl::CreateUserWallpaperDelegate() {
   return NULL;
 }
 
+ash::CapsLockDelegate* ShellDelegateImpl::CreateCapsLockDelegate() {
+  return new CapsLockDelegateStub;
+}
+
 aura::client::UserActionClient* ShellDelegateImpl::CreateUserActionClient() {
   return NULL;
 }