Dim the window when URL is being edited.

Change-Id: Ib10a61413074baa095f264138567b4112e31abb6
diff --git a/src/com/android/browser/Controller.java b/src/com/android/browser/Controller.java
index e643d45..5d8ac35 100644
--- a/src/com/android/browser/Controller.java
+++ b/src/com/android/browser/Controller.java
@@ -75,6 +75,7 @@
 import android.view.MenuItem.OnMenuItemClickListener;
 import android.view.MotionEvent;
 import android.view.View;
+import android.view.WindowManager;
 import android.webkit.MimeTypeMap;
 import android.webkit.ValueCallback;
 import android.webkit.WebChromeClient.CustomViewCallback;
@@ -3314,6 +3315,17 @@
         mActivity.startActivityForResult(voice, VOICE_RESULT);
     }
 
+    public void setWindowDimming(float level) {
+        if (level != 0) {
+            WindowManager.LayoutParams lp = mActivity.getWindow().getAttributes();
+            lp.dimAmount = level;
+            mActivity.getWindow().setAttributes(lp);
+            mActivity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
+        } else {
+            mActivity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
+        }
+    }
+
     @Override
     public void setBlockEvents(boolean block) {
         mBlockEvents = block;