Expose the Site Engagement Service to Java.

chrome/browser/engagement/site_engagement_service.cc

Index: chrome/browser/engagement/site_engagement_service.cc
diff --git a/chrome/browser/engagement/site_engagement_service.cc b/chrome/browser/engagement/site_engagement_service.cc
index 66a2b4976dcf901a748a3c385fe9a88499480e08..3fa29c7c23adbb19e644716afc9fa8b0f8ef9c1c 100644
--- a/chrome/browser/engagement/site_engagement_service.cc
+++ b/chrome/browser/engagement/site_engagement_service.cc
@@ -36,6 +36,10 @@
 #include "content/public/browser/web_contents.h"
 #include "url/gurl.h"
 
+#if defined(OS_ANDROID)
+#include "chrome/browser/engagement/site_engagement_service_android.h"
+#endif
+
 namespace {
 
 const int FOUR_WEEKS_IN_DAYS = 28;
@@ -238,6 +242,17 @@ double SiteEngagementService::GetTotalEngagementPoints() const {
   return total_score;
 }
 
+#if defined(OS_ANDROID)
+SiteEngagementServiceAndroid* SiteEngagementService::GetAndroidService() const {
+  return android_service_.get();
+}
+
+void SiteEngagementService::SetAndroidService(
+    std::unique_ptr<SiteEngagementServiceAndroid> android_service) {
+  android_service_ = std::move(android_service);
+}
+#endif
+
 SiteEngagementService::SiteEngagementService(Profile* profile,
                                              std::unique_ptr<base::Clock> clock)
     : profile_(profile), clock_(std::move(clock)), weak_factory_(this) {