Allow incomplete params for site engagement configs.

chrome/browser/engagement/site_engagement_score.cc

Index: chrome/browser/engagement/site_engagement_score.cc
diff --git a/chrome/browser/engagement/site_engagement_score.cc b/chrome/browser/engagement/site_engagement_score.cc
index d38d2ad9f349ddfa7d0d7f635d88c7627895ea42..118936d68b1471c26ed4764b57689d41f78c8487 100644
--- a/chrome/browser/engagement/site_engagement_score.cc
+++ b/chrome/browser/engagement/site_engagement_score.cc
@@ -157,25 +157,21 @@ double SiteEngagementScore::GetLastEngagementGracePeriodInHours() {
 
 // static
 void SiteEngagementScore::UpdateFromVariations(const char* param_name) {
-  double param_vals[MAX_VARIATION];
-
   for (int i = 0; i < MAX_VARIATION; ++i) {
+    double param;
     std::string param_string = variations::GetVariationParamValue(
         param_name, GetParamValues()[i].first);
 
     // Bail out if we didn't get a param string for the key, or if we couldn't
     // convert the param string to a double, or if we get a negative value.
     if (param_string.empty() ||
-        !base::StringToDouble(param_string, &param_vals[i]) ||
-        param_vals[i] < 0) {
-      return;
+        !base::StringToDouble(param_string, &param) ||
+        param < 0) {
+      continue;
     }
-  }
 
-  // Once we're sure everything is valid, assign the variation to the param
-  // values array.
-  for (int i = 0; i < MAX_VARIATION; ++i)
-    SiteEngagementScore::GetParamValues()[i].second = param_vals[i];
+    SiteEngagementScore::GetParamValues()[i].second = param;
+  }
 }
 
 SiteEngagementScore::SiteEngagementScore(