Start background tabs hidden

Background tabs should start using the policy OPEN_BACKGROUND_TAB
so that Blink does not try to render the non-visible view.

Change-Id: I213e733c1a97bc1aae4104691b4c57f6c8bf3f3e
Fixes-issue: SWE-2733
diff --git a/src/com/android/browser/BrowserWebView.java b/src/com/android/browser/BrowserWebView.java
index e2348a5..9215fe5 100644
--- a/src/com/android/browser/BrowserWebView.java
+++ b/src/com/android/browser/BrowserWebView.java
@@ -60,6 +60,16 @@
      * @param defStyle
      */
     public BrowserWebView(
+            Context context, AttributeSet attrs, int defStyle, boolean privateBrowsing, boolean backgroundTab) {
+        super(context, attrs, defStyle, privateBrowsing, backgroundTab);
+    }
+
+    /**
+     * @param context
+     * @param attrs
+     * @param defStyle
+     */
+    public BrowserWebView(
             Context context, AttributeSet attrs, int defStyle, boolean privateBrowsing) {
         super(context, attrs, defStyle, privateBrowsing);
     }