Remove use of private APIs

Change-Id: I3e28763075f8e92391796dc009214c9fa8f50008
diff --git a/src/com/android/launcher2/FocusHelper.java b/src/com/android/launcher2/FocusHelper.java
index 0066440..e9f986d 100644
--- a/src/com/android/launcher2/FocusHelper.java
+++ b/src/com/android/launcher2/FocusHelper.java
@@ -85,8 +85,7 @@
      */
     static boolean handleAppsCustomizeTabKeyEvent(View v, int keyCode, KeyEvent e) {
         final TabHost tabHost = findTabHostParent(v);
-        final ViewGroup contents = (ViewGroup)
-                tabHost.findViewById(com.android.internal.R.id.tabcontent);
+        final ViewGroup contents = tabHost.getTabContentView();
         final View shop = tabHost.findViewById(R.id.market_button);
 
         final int action = e.getAction();
@@ -137,7 +136,7 @@
         final PagedViewGridLayout parent = (PagedViewGridLayout) w.getParent();
         final PagedView container = (PagedView) parent.getParent();
         final TabHost tabHost = findTabHostParent(container);
-        final TabWidget tabs = (TabWidget) tabHost.findViewById(com.android.internal.R.id.tabs);
+        final TabWidget tabs = tabHost.getTabWidget();
         final int widgetIndex = parent.indexOfChild(w);
         final int widgetCount = parent.getChildCount();
         final int pageIndex = ((PagedView) container).indexToPage(container.indexOfChild(parent));
@@ -297,7 +296,7 @@
         // PagedViewCellLayout/PagedViewCellLayoutChildren relationship
         final PagedView container = (PagedView) parentLayout.getParent();
         final TabHost tabHost = findTabHostParent(container);
-        final TabWidget tabs = (TabWidget) tabHost.findViewById(com.android.internal.R.id.tabs);
+        final TabWidget tabs = tabHost.getTabWidget();
         final int iconIndex = itemContainer.indexOfChild(v);
         final int itemCount = itemContainer.getChildCount();
         final int pageIndex = ((PagedView) container).indexToPage(container.indexOfChild(parentLayout));
@@ -442,8 +441,7 @@
 
         final FocusOnlyTabWidget parent = (FocusOnlyTabWidget) v.getParent();
         final TabHost tabHost = findTabHostParent(parent);
-        final ViewGroup contents = (ViewGroup)
-                tabHost.findViewById(com.android.internal.R.id.tabcontent);
+        final ViewGroup contents = tabHost.getTabContentView();
         final int tabCount = parent.getTabCount();
         final int tabIndex = parent.getChildTabIndex(v);