From 7b889fe92a45ebce932f5cc19632d7e647533fae Mon Sep 17 00:00:00 2001
From: Lucas Rocha <lucasr@mozilla.com>
Date: Tue, 14 Feb 2012 17:50:55 +0000
Subject: [PATCH] Bug 723103 - Update about:home's top sites section after
 history is cleared (r=mfinkle)

---
 mobile/android/base/ConfirmPreference.java |  1 +
 mobile/android/base/GeckoApp.java          | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/mobile/android/base/ConfirmPreference.java b/mobile/android/base/ConfirmPreference.java
index 2013436917ee..7d5ae4441316 100644
--- a/mobile/android/base/ConfirmPreference.java
+++ b/mobile/android/base/ConfirmPreference.java
@@ -68,6 +68,7 @@ class ConfirmPreference extends DialogPreference {
                     BrowserDB.clearHistory(mContext.getContentResolver());
                     GeckoApp.mAppContext.mFavicons.clearFavicons();
                     GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("browser:purge-session-history", null));
+                    GeckoApp.mAppContext.handleClearHistory();
                 }
             });
         } else if ("clear_private_data".equalsIgnoreCase(mAction)) {
diff --git a/mobile/android/base/GeckoApp.java b/mobile/android/base/GeckoApp.java
index 2afdf282981e..c6e8a58b4799 100644
--- a/mobile/android/base/GeckoApp.java
+++ b/mobile/android/base/GeckoApp.java
@@ -797,6 +797,18 @@ abstract public class GeckoApp
         });
     }
 
+    void handleClearHistory() {
+        if (mAboutHomeContent == null)
+            return;
+
+        GeckoApp.mAppContext.mMainHandler.post(new Runnable() {
+            public void run() {
+                mAboutHomeContent.update(GeckoApp.mAppContext,
+                        EnumSet.of(AboutHomeContent.UpdateFlags.TOP_SITES));
+            }
+        });
+    }
+
     public StartupMode getStartupMode() {
         // This function might touch the disk and should not
         // be called from UI's main thread.