[Reland] [Extensions] Make extension message bubble factory platform-abstract

chrome/browser/ui/toolbar/toolbar_actions_bar.h

Index: chrome/browser/ui/toolbar/toolbar_actions_bar.h
diff --git a/chrome/browser/ui/toolbar/toolbar_actions_bar.h b/chrome/browser/ui/toolbar/toolbar_actions_bar.h
index 3a6798fc29a10a08f7d57583cb485b201263c7ec..349736cbde1ecfea49466fe991ad0943f3650d48 100644
--- a/chrome/browser/ui/toolbar/toolbar_actions_bar.h
+++ b/chrome/browser/ui/toolbar/toolbar_actions_bar.h
@@ -7,6 +7,7 @@
 
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
+#include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "chrome/browser/extensions/extension_toolbar_model.h"
 #include "chrome/browser/ui/toolbar/toolbar_actions_bar_bubble_delegate.h"
@@ -198,6 +199,9 @@ class ToolbarActionsBar : public extensions::ExtensionToolbarModel::Observer,
   // Sets |overflowed_action_wants_to_run_| to the proper value.
   void SetOverflowedActionWantsToRun();
 
+  // Shows an extension message bubble, if any should be shown.
+  void MaybeShowExtensionBubble();
+
   bool in_overflow_mode() const { return main_bar_ != nullptr; }
 
   // The delegate for this object (in a real build, this is the view).
@@ -247,6 +251,12 @@ class ToolbarActionsBar : public extensions::ExtensionToolbarModel::Observer,
   // True if an action in the overflow menu wants to run.
   bool overflowed_action_wants_to_run_;
 
+  // True if we have checked to see if there is an extension bubble that should
+  // be displayed, and, if there is, shown that bubble.
+  bool checked_extension_bubble_;
+
+  base::WeakPtrFactory<ToolbarActionsBar> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ToolbarActionsBar);
 };