[aw] Add support library interface for IsMultiProcessEnabled

Add support library interface for the multi process query API.

Bug: 948164
Change-Id: I9af5321056de1acc570322c6bd01610735ec919e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1547735
Commit-Queue: Laís Minchillo <laisminchillo@chromium.org>
Auto-Submit: Laís Minchillo <laisminchillo@chromium.org>
Reviewed-by: Tobias Sargeant <tobiasjs@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#646804}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 05099cb0ad093825cbdeabb30c668e268e30fef8
diff --git a/src/org/chromium/support_lib_boundary/StaticsBoundaryInterface.java b/src/org/chromium/support_lib_boundary/StaticsBoundaryInterface.java
index d60a60d..648d416 100644
--- a/src/org/chromium/support_lib_boundary/StaticsBoundaryInterface.java
+++ b/src/org/chromium/support_lib_boundary/StaticsBoundaryInterface.java
@@ -17,4 +17,5 @@
     void initSafeBrowsing(Context context, ValueCallback<Boolean> callback);
     void setSafeBrowsingWhitelist(List<String> hosts, ValueCallback<Boolean> callback);
     Uri getSafeBrowsingPrivacyPolicyUrl();
+    boolean isMultiProcessEnabled();
 }
diff --git a/src/org/chromium/support_lib_boundary/util/Features.java b/src/org/chromium/support_lib_boundary/util/Features.java
index fbf0625..02e6413 100644
--- a/src/org/chromium/support_lib_boundary/util/Features.java
+++ b/src/org/chromium/support_lib_boundary/util/Features.java
@@ -156,4 +156,7 @@
     // WebViewRendererClient.onRendererResponsive()
     public static final String WEB_VIEW_RENDERER_CLIENT_BASIC_USAGE =
             "WEB_VIEW_RENDERER_CLIENT_BASIC_USAGE";
+
+    // WebViewCompat.isMultiProcessEnabled
+    public static final String MULTI_PROCESS_QUERY = "MULTI_PROCESS_QUERY";
 }