Bug 1055601 - Don't flicker about:home URL when new tab is created (r=mcomella)

mobile/android/base/locales/en-US/android_strings.dtd

@@ -388,6 +388,9 @@ size. -->
      text underneath empty thumbnails in the Top Sites page on about:home. -->
 <!ENTITY home_top_sites_add "Add a site">
 
+<!-- Localization note (home_title): This string should be kept in sync
+     with the page title defined in aboutHome.dtd -->
+<!ENTITY home_title "&brandShortName; Home">
 <!ENTITY home_history_title "History">
 <!ENTITY home_clear_history_button "Clear browsing history">
 <!ENTITY home_clear_history_confirm "Are you sure you want to clear your history?">

mobile/android/base/strings.xml.in

@@ -343,6 +343,7 @@
   <string name="button_yes">&button_yes;</string>
   <string name="button_no">&button_no;</string>
 
+  <string name="home_title">&home_title;</string>
   <string name="home_top_sites_title">&home_top_sites_title;</string>
   <string name="home_top_sites_add">&home_top_sites_add;</string>
   <string name="home_history_title">&home_history_title;</string>

mobile/android/base/tabs/TabStripItemView.java

@@ -5,6 +5,7 @@
 
 package org.mozilla.gecko.tabs;
 
+import org.mozilla.gecko.AboutPages;
 import org.mozilla.gecko.R;
 import org.mozilla.gecko.Tab;
 import org.mozilla.gecko.Tabs;
@@ -20,6 +21,7 @@ import android.graphics.Path;
 import android.graphics.PorterDuff.Mode;
 import android.graphics.PorterDuffXfermode;
 import android.graphics.Region;
+import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
@@ -199,11 +201,25 @@ public class TabStripItemView extends ThemedLinearLayout
         }
 
         id = tab.getId();
+
+        updateTitle(tab);
         updateFavicon(tab.getFavicon());
-        titleView.setText(tab.getDisplayTitle());
         setPrivateMode(tab.isPrivate());
     }
 
+    private void updateTitle(Tab tab) {
+        final String title;
+
+        // Avoid flickering the about:home URL on every load given how often
+        // this page is used in the UI.
+        if (AboutPages.isAboutHome(tab.getURL())) {
+            titleView.setText(R.string.home_title);
+        } else {
+            titleView.setText(tab.getDisplayTitle());
+        }
+
+    }
+
     private void updateFavicon(final Bitmap favicon) {
         if (favicon == null) {
             lastFavicon = null;

mobile/android/locales/en-US/chrome/aboutHome.dtd

@@ -2,4 +2,6 @@
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
+<!-- This string should be kept in sync with the home_title string
+     in android_strings.dtd -->
 <!ENTITY abouthome.title                  "&brandShortName; Home">