Several Site Details / Memory metrics fixes

chrome/browser/site_details.h

Index: chrome/browser/site_details.h
diff --git a/chrome/browser/site_details.h b/chrome/browser/site_details.h
index a8833d2601ac634b5f731d1c0c947019485882cd..da613373d276a0103dcfbc20212c03f54523d1b3 100644
--- a/chrome/browser/site_details.h
+++ b/chrome/browser/site_details.h
@@ -16,6 +16,7 @@ typedef base::hash_map<int32, std::set<GURL>> BrowsingInstanceSiteMap;
 // This enum represents various alternative process model policies that we want
 // to evaluate. We'll estimate the process cost of each scenario.
 enum IsolationScenarioType {
+  ISOLATE_NOTHING,
   ISOLATE_ALL_SITES,
   ISOLATE_HTTPS_SITES,
   ISOLATE_EXTENSIONS,
@@ -28,11 +29,6 @@ struct IsolationScenario {
   IsolationScenario();
   ~IsolationScenario();
 
-  void CollectSiteInfoForScenario(content::SiteInstance* primary,
-                                  const GURL& site);
-  void GetProcessCountEstimate();
-  void GetProcessCountLowerBound();
-
   IsolationScenarioType policy;
   std::set<GURL> sites;
   BrowsingInstanceSiteMap browsing_instance_site_map;