Properly sizing search view.

Bug: 3114424
Change-Id: I5008764392ada784e75fe90d66eed5d47e1c94ee
diff --git a/res/layout/navigation_bar.xml b/res/layout/navigation_bar.xml
index b52815c..f30cc58 100644
--- a/res/layout/navigation_bar.xml
+++ b/res/layout/navigation_bar.xml
@@ -98,9 +98,10 @@
     <view
         class="android.widget.SearchView"
         android:id="@+id/search_view"
-        android:layout_width="wrap_content"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_gravity="center_vertical" />
+        android:layout_gravity="center_vertical"
+        android:maxWidth="300dip" />
     />
 
 </LinearLayout>