Add GetTotalEngagementPoints to SiteEngagementService.

chrome/browser/engagement/site_engagement_service_unittest.cc

Index: chrome/browser/engagement/site_engagement_service_unittest.cc
diff --git a/chrome/browser/engagement/site_engagement_service_unittest.cc b/chrome/browser/engagement/site_engagement_service_unittest.cc
index 0bc9543df3829cc1a471e582182f99ece05f6fab..5a5ee39d55d6a70bd3879a74e6198d7903b90ef0 100644
--- a/chrome/browser/engagement/site_engagement_service_unittest.cc
+++ b/chrome/browser/engagement/site_engagement_service_unittest.cc
@@ -326,11 +326,15 @@ TEST_F(SiteEngagementServiceTest, ScoreIncrementsOnPageRequest) {
   AddTab(browser(), GURL("about:blank"));
   EXPECT_EQ(0, service->GetScore(url));
   int prev_score = service->GetScore(url);
+  int prev_total_score = service->GetTotalEngagementPoints();
 
   NavigateAndCommitActiveTab(url);
   EXPECT_LT(prev_score, service->GetScore(url));
   prev_score = service->GetScore(url);
+  EXPECT_LT(prev_total_score, service->GetTotalEngagementPoints());
+  prev_total_score = service->GetTotalEngagementPoints();
 
   NavigateAndCommitActiveTab(url);
   EXPECT_LT(prev_score, service->GetScore(url));
+  EXPECT_LT(prev_total_score, service->GetTotalEngagementPoints());
 }

[raymes, 2015/07/01 05:33:09]

Could we add a new test where we browse to a bunch of sites and check that the
individual scores (service->GetScore) add up to the total score?

[calamity, 2015/07/06 01:51:06]

Yep, I just needed to check with benwells why this didn't use real numbers and
stuff.