Don't show the zoom bubble when the settings menu is showing on views or GTK.

chrome/browser/ui/gtk/browser_toolbar_gtk.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_GTK_BROWSER_TOOLBAR_GTK_H_
 #define CHROME_BROWSER_UI_GTK_BROWSER_TOOLBAR_GTK_H_
 
 #include <gtk/gtk.h>
 #include <string>
 
@@ skipping 86 matching lines @@
   // Overridden from ui::AcceleratorProvider:
   virtual bool GetAcceleratorForCommandId(
       int id,
       ui::Accelerator* accelerator) OVERRIDE;
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // Whether the wrench/hotdogs menu is currently visible to the user.
+  bool IsWrenchMenuShowing() const;
+
   // Message that we should react to a state change.
   void UpdateWebContents(content::WebContents* contents,
                          bool should_restore_state);
 
  private:
   // Connect/Disconnect signals for dragging a url onto the home button.
   void SetUpDragForHomeButton(bool enable);
 
   // Sets the top corners of the toolbar to rounded, or sets them to normal,
   // depending on the state of the browser window. Returns false if no action
@@ skipping 98 matching lines @@
   // rendering.
   ui::OwnedWidgetGtk offscreen_entry_;
 
   // Manages the home button drop signal handler.
   scoped_ptr<ui::GtkSignalRegistrar> drop_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserToolbarGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_BROWSER_TOOLBAR_GTK_H_