[Custom Tabs] Allow clients to display RemoteViews on the bottom bar

chrome/android/java/src/android/support/customtabs/CustomTabsIntent.java

Index: chrome/android/java/src/android/support/customtabs/CustomTabsIntent.java
diff --git a/chrome/android/java/src/android/support/customtabs/CustomTabsIntent.java b/chrome/android/java/src/android/support/customtabs/CustomTabsIntent.java
index 3cb66a23eafa1061388b3d2bffb419a55a343937..c3c3a9139c8a07ec2340a9e260e4940a5f66d4fc 100644
--- a/chrome/android/java/src/android/support/customtabs/CustomTabsIntent.java
+++ b/chrome/android/java/src/android/support/customtabs/CustomTabsIntent.java
@@ -14,6 +14,7 @@ import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.IBinder;
+import android.widget.RemoteViews;
 
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
@@ -162,6 +163,14 @@ public class CustomTabsIntent {
             "android.support.customtabs.extra.SECONDARY_TOOLBAR_COLOR";
 
     /**
+     * Extra that specifies the {@link RemoteViews} showing on the secondary toolbar. If this extra
+     * is set, the other secondary toolbar configurations will be overriden. The height of the
+     * {@link RemoteViews} should not exceed 56dp.
+     */
+    public static final String EXTRA_SECONDARY_TOOLBAR_REMOTEVIEWS =
+            "android.support.customtabs.extra.EXTRA_SECONDARY_TOOLBAR_REMOTEVIEWS";
+
+    /**
      * Convenience method to create a VIEW intent without a session for the given package.
      * @param packageName The package name to set in the intent.
      * @param data        The data {@link Uri} to be used in the intent.