Move functions for controlling Caps Lock to CapsLockDelegate from SystemTrayDelegate.

ash/test/test_shell_delegate.cc

Index: ash/test/test_shell_delegate.cc
diff --git a/ash/test/test_shell_delegate.cc b/ash/test/test_shell_delegate.cc
index 3ecb75a2f20a9a9bd8d5d3df1b9d3cfb186d666c..d6f6234736eb53cfecdbc845ff7800de59be5777 100644
--- a/ash/test/test_shell_delegate.cc
+++ b/ash/test/test_shell_delegate.cc
@@ -6,6 +6,7 @@
 
 #include <algorithm>
 
+#include "ash/caps_lock_delegate_stub.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/test_launcher_delegate.h"
@@ -108,6 +109,10 @@ UserWallpaperDelegate* TestShellDelegate::CreateUserWallpaperDelegate() {
   return NULL;
 }
 
+CapsLockDelegate* TestShellDelegate::CreateCapsLockDelegate() {
+  return new CapsLockDelegateStub;
+}
+
 aura::client::UserActionClient* TestShellDelegate::CreateUserActionClient() {
   return NULL;
 }