Animate url bar hide/show

 Bug: 3443911

Change-Id: I3121371a784d17183a62dd8f9323de900b792b21
diff --git a/src/com/android/browser/BaseUi.java b/src/com/android/browser/BaseUi.java
index 5084e31..e89012f 100644
--- a/src/com/android/browser/BaseUi.java
+++ b/src/com/android/browser/BaseUi.java
@@ -17,11 +17,8 @@
 package com.android.browser;
 
 import com.android.browser.Tab.LockIcon;
-import com.android.browser.UI.DropdownChangeListener;
 
-import android.animation.Animator;
-import android.animation.Animator.AnimatorListener;
-import android.animation.ObjectAnimator;
+import android.animation.LayoutTransition;
 import android.app.Activity;
 import android.content.res.Configuration;
 import android.content.res.Resources;
@@ -114,6 +111,7 @@
                 .inflate(R.layout.custom_screen, null);
         mContentView = (FrameLayout) mBrowserFrameLayout.findViewById(
                 R.id.main_content);
+        mContentView.setLayoutTransition(new LayoutTransition());
         mErrorConsoleContainer = (LinearLayout) mBrowserFrameLayout
                 .findViewById(R.id.error_console);
         mCustomViewContainer = (FrameLayout) mBrowserFrameLayout
@@ -460,11 +458,6 @@
             WebView web = mActiveTab.getWebView();
             mActiveTab.putInBackground();
         }
-        mComboView.setAlpha(0f);
-        ObjectAnimator anim = ObjectAnimator.ofFloat(mComboView, "alpha", 0f, 1f);
-        Resources res = mActivity.getResources();
-        anim.setDuration(res.getInteger(R.integer.comboViewFadeInDuration));
-        anim.start();
         mContentView.addView(mComboView, COVER_SCREEN_PARAMS);
     }