[Home] Add a bottom navigation bar for the BottomSheet

chrome/android/java/res/layout/main.xml

Index: chrome/android/java/res/layout/main.xml
diff --git a/chrome/android/java/res/layout/main.xml b/chrome/android/java/res/layout/main.xml
index 54c916c758b36ed4c34014cf29576691d3096efe..b1767cd41fe4e0e63aae8e3bd83ef99c19692ce0 100644
--- a/chrome/android/java/res/layout/main.xml
+++ b/chrome/android/java/res/layout/main.xml
@@ -3,7 +3,8 @@
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file. -->
 
-<merge xmlns:android="http://schemas.android.com/apk/res/android">
+<merge xmlns:android="http://schemas.android.com/apk/res/android"
+       xmlns:app="http://schemas.android.com/apk/res-auto">
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -70,6 +71,17 @@
                 android:layout_width="match_parent"
                 android:layout_height="match_parent" />
 
+            <org.chromium.chrome.browser.widget.BottomSheetBottomNav

[mdjones, 2017/03/09 16:52:10]

Since this is on the main layout, should we conditionally inflate this or does
visibility="gone" prevent resource usage? 

[Theresa, 2017/03/09 17:55:44]

Done. No, I think resources are still allocated even with visibility="gone"
(based on Android monitor).

+                android:id="@+id/bottom_nav"
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/bottom_nav_height"
+                android:layout_gravity="start|bottom"
+                android:background="@color/appbar_background"
+                app:menu="@menu/bottom_sheet_nav_menu"
+                app:itemIconTint="@color/bottom_nav_tint"
+                app:itemTextColor="@color/bottom_nav_tint"
+                android:visibility="gone" />
+
         </android.support.design.widget.CoordinatorLayout>
 
         <HorizontalScrollView