De-focus url input before tab data change

  Bug: 6315452

Change-Id: I1540122a7dd31fc2cf477b4f70ff88cdbcecc56e
diff --git a/src/com/android/browser/BaseUi.java b/src/com/android/browser/BaseUi.java
index f8a9414..9aaceeb 100644
--- a/src/com/android/browser/BaseUi.java
+++ b/src/com/android/browser/BaseUi.java
@@ -251,6 +251,7 @@
         updateUrlBarAutoShowManagerTarget();
         attachTabToContentView(tab);
         mTitleBar.bringToFront();
+        tab.getTopWindow().requestFocus();
         setShouldShowErrorConsole(tab, mUiController.shouldShowErrorConsole());
         onTabDataChanged(tab);
         onProgressChanged(tab);