[Home] Make BottomToolbarPhone focusable

Previously BottomToolbarPhone was only focusable when the expand button
wasn't enabled. This change makes it always focusable, ensuring that the
first visible focusable item isn't the URL bar. This prevents Android
from focusing the URL bar when returning to Chrome from Android recents.

BUG=731603

Change-Id: I375c1e9539358ae1dfc4031fb9893afbc5a4bacd
Reviewed-on: https://chromium-review.googlesource.com/530160
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#478461}

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

@@ -10,7 +10,9 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/toolbar"
     android:layout_width="match_parent"
-    android:layout_height="match_parent" >
+    android:layout_height="match_parent"
+    android:focusable="true"
+    android:focusableInTouchMode="true" >
 
     <include layout="@layout/toolbar_phone_common"/>
 

chrome/android/java/src/org/chromium/chrome/browser/toolbar/BottomToolbarPhone.java

@@ -441,8 +441,6 @@ public void onNativeLibraryReady() {
         if (!mUseToolbarHandle) {
             initExpandButton();
         } else {
-            setFocusable(true);
-            setFocusableInTouchMode(true);
             setContentDescription(
                     getResources().getString(R.string.bottom_sheet_accessibility_toolbar));
         }