Reland r265807: "Moves the notification icon out of th..."

chrome/browser/status_icons/status_icon.h

Index: chrome/browser/status_icons/status_icon.h
diff --git a/chrome/browser/status_icons/status_icon.h b/chrome/browser/status_icons/status_icon.h
index 7cb88992914f88f553d786feb0011c1939cf57ff..b0f28a3efdea57eca896eae5a19ff97ae7c47807 100644
--- a/chrome/browser/status_icons/status_icon.h
+++ b/chrome/browser/status_icons/status_icon.h
@@ -60,6 +60,13 @@ class StatusIcon {
   void DispatchBalloonClickEvent();
 #endif
 
+  // Attempts to make the status icon directly visible on system UI.  Currently
+  // this only applies to Windows, where status icons are hidden by default
+  // inside an overflow window.
+  // WARNING: This currently uses undocumented Windows APIs and spawns a worker
+  // thread to do it.  Use sparingly.
+  virtual void ForceVisible();
+
  protected:
   // Invoked after a call to SetContextMenu() to let the platform-specific
   // subclass update the native context menu based on the new model. If NULL is