Bug 1432624 - Left-truncate and ellipsize domain in custom tabs to reduce phishing risk. r=snorp

mobile/android/app/src/main/res/layout/customtabs_action_bar_custom_view.xml

@@ -52,7 +52,7 @@
             android:singleLine="true"
             android:textColor="?android:textColorPrimary"
             android:textSize="10sp"
-            android:ellipsize="middle"
+            android:ellipsize="start"
             android:scrollHorizontally="true"
             tools:text="https://mozilla.org"/>
 

mobile/android/base/java/org/mozilla/gecko/customtabs/ActionBarPresenter.java

@@ -8,6 +8,7 @@ package org.mozilla.gecko.customtabs;
 import android.content.res.Resources;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
+import android.net.Uri;
 import android.os.Build;
 import android.os.Handler;
 import android.support.annotation.ColorInt;
@@ -237,7 +238,8 @@ public class ActionBarPresenter {
             mUrlView.setVisibility(View.GONE);
         } else {
             mTitleView.setText(title);
-            mUrlView.setText(url);
+            String domain = Uri.parse(url).getHost();
+            mUrlView.setText(domain);
             mUrlView.setVisibility(View.VISIBLE);
         }
     }