[gtk] fix a corner case where the status bubble was in the way of the cursor.

chrome/browser/gtk/status_bubble_gtk.h

 // Copyright (c) 2009 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_GTK_STATUS_BUBBLE_GTK_H_
 #define CHROME_BROWSER_GTK_STATUS_BUBBLE_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 87 matching lines @@
 
   // Returns true if the status bubble is in the expand-state (i.e., is
   // currently expanded or in the process of expanding).
   bool expanded() {
     return expand_animation_.get();
   }
 
   CHROMEGTK_CALLBACK_1(StatusBubbleGtk, gboolean, HandleMotionNotify,
                        GdkEventMotion*);
 
+  CHROMEGTK_CALLBACK_1(StatusBubbleGtk, gboolean, HandleEnterNotify,
+                       GdkEventCrossing*);
+
   NotificationRegistrar registrar_;
 
   // Provides colors.
   GtkThemeProvider* theme_provider_;
 
   // The toplevel event box.
   OwnedWidgetGtk container_;
 
   // The GtkAlignment holding |label_|.
   GtkWidget* padding_;
@@ skipping 36 matching lines @@
   int y_offset_;
 
   // If the download shelf is visible, do not obscure it.
   bool download_shelf_is_visible_;
 
   // 'location' and 'left_content' values from the last invocation of
   // MouseMoved().  We hang onto these so we can move the bubble if necessary
   // when its text changes, triggering a size change.
   gfx::Point last_mouse_location_;
   bool last_mouse_left_content_;
+
+  // Shortly after the cursor enters the status bubble, we'll get a message
+  // that the cursor left the content area. This lets us ignore that.
+  bool ignore_next_left_content_;
 };
 
 #endif  // CHROME_BROWSER_GTK_STATUS_BUBBLE_GTK_H_