Set the url input to current page when cleared

 Bug: 4099000

Change-Id: I3a96b35a5234089fb76393273c250f3bfe0149eb
diff --git a/src/com/android/browser/TitleBarXLarge.java b/src/com/android/browser/TitleBarXLarge.java
index a786fd7..9fce511 100644
--- a/src/com/android/browser/TitleBarXLarge.java
+++ b/src/com/android/browser/TitleBarXLarge.java
@@ -267,6 +267,13 @@
             if (mUseQuickControls) {
                 mUi.hideTitleBar();
             }
+
+            if (mUrlInput.getText().length() == 0) {
+                Tab currentTab = mUiController.getTabControl().getCurrentTab();
+                if (currentTab != null) {
+                    mUrlInput.setText(currentTab.getUrl(), false);
+                }
+            }
         }
         mUrlInput.clearNeedsUpdate();
     }