From fd802e39b53b76248993245cabdd41707f093138 Mon Sep 17 00:00:00 2001
From: Margaret Leibovic <margaret.leibovic@gmail.com>
Date: Mon, 24 Sep 2012 14:48:21 -0700
Subject: [PATCH] Bug 789887 - Avoid creating unnecessary AboutHomeRunnables.
 r=lucasr

---
 mobile/android/base/BrowserApp.java | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/mobile/android/base/BrowserApp.java b/mobile/android/base/BrowserApp.java
index 69af635e741..65e0c5bad29 100644
--- a/mobile/android/base/BrowserApp.java
+++ b/mobile/android/base/BrowserApp.java
@@ -51,6 +51,7 @@ abstract public class BrowserApp extends GeckoApp
 
     public static BrowserToolbar mBrowserToolbar;
     private AboutHomeContent mAboutHomeContent;
+    private boolean mAboutHomeShowing;
 
     static Vector<MenuItem> sAddonMenuItems = new Vector<MenuItem>();
 
@@ -584,17 +585,25 @@ abstract public class BrowserApp extends GeckoApp
         mAboutHomeContent.update(EnumSet.of(AboutHomeContent.UpdateFlags.TOP_SITES));
     }
 
-    public void showAboutHome() {
+    private void showAboutHome() {
+        if (mAboutHomeShowing)
+            return;
+
+        mAboutHomeShowing = true;
         Runnable r = new AboutHomeRunnable(true);
         mMainHandler.postAtFrontOfQueue(r);
     }
 
-    public void hideAboutHome() {
+    private void hideAboutHome() {
+        if (!mAboutHomeShowing)
+            return;
+
+        mAboutHomeShowing = false;
         Runnable r = new AboutHomeRunnable(false);
         mMainHandler.postAtFrontOfQueue(r);
     }
 
-    public class AboutHomeRunnable implements Runnable {
+    private class AboutHomeRunnable implements Runnable {
         boolean mShow;
         AboutHomeRunnable(boolean show) {
             mShow = show;