Add a new GetInstance() method for singleton classes, take 2.

views/focus/focus_manager.cc

Index: views/focus/focus_manager.cc
diff --git a/views/focus/focus_manager.cc b/views/focus/focus_manager.cc
index 2007ff1d05fc2c141694c93aa87840769d19b111..4848e4bda075601adc7f3b11cdeddd204d62bd4a 100644
--- a/views/focus/focus_manager.cc
+++ b/views/focus/focus_manager.cc
@@ -80,6 +80,11 @@ FocusManager::~FocusManager() {
   DCHECK(focus_change_listeners_.empty());
 }
 
+// static
+FocusManager::WidgetFocusManager* FocusManager::GetWidgetFocusManager() {
+  return Singleton<WidgetFocusManager>::get();
+}
+
 bool FocusManager::OnKeyEvent(const KeyEvent& event) {
 #if defined(OS_WIN)
   // If the focused view wants to process the key event as is, let it be.