Make FirstRunActivity extend AsyncInitializationActivity.

chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunPagerAdapter.java

Index: chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunPagerAdapter.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunPagerAdapter.java b/chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunPagerAdapter.java
index 79cb987570f63670ef61505e33ce530308178d25..5de1eba4005951234f78d3f9adb3d1d09366ec22 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunPagerAdapter.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunPagerAdapter.java
@@ -68,8 +68,11 @@ class FirstRunPagerAdapter extends FragmentStatePagerAdapter {
 
     @Override
     public int getItemPosition(Object object) {
-        // We do not keep track of constructed objects, but we want the pages to be recreated
-        // on notifyDataSetChanged. Hence, tell the view that it needs to refresh the objects.
+        // Each page can specify whether it should be re-created or not on a notifyDataSetChanged.
+        if (object instanceof FirstRunPage) {
+            FirstRunPage page = (FirstRunPage) object;
+            return page.shouldRecreatePageOnDataChange() ? POSITION_NONE : POSITION_UNCHANGED;
+        }
         return POSITION_NONE;
     }
-}
+}