Remove command line/field trial support and configs for Isolate Extensions.

chrome/browser/site_details.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_SITE_DETAILS_H_
 #define CHROME_BROWSER_SITE_DETAILS_H_
 
 #include <stdint.h>
 
 #include "base/containers/hash_tables.h"
@@ skipping 25 matching lines @@
 };
 using BrowsingInstanceMap =
     base::hash_map<content::SiteInstance*, BrowsingInstanceInfo>;
 
 // 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,
-  ISOLATION_SCENARIO_LAST = ISOLATE_EXTENSIONS
+  ISOLATION_SCENARIO_LAST = ISOLATE_HTTPS_SITES
 };
 
 // Contains the state required to estimate the process count under a particular
 // process model. We have one of these per IsolationScenarioType.
 struct IsolationScenario {
   IsolationScenario();
   IsolationScenario(const IsolationScenario& other);
   ~IsolationScenario();
 
   IsolationScenarioType policy = ISOLATE_NOTHING;
@@ skipping 39 matching lines @@
 
  private:
   // Never needs to be constructed.
   SiteDetails();
   ~SiteDetails();
 
   DISALLOW_COPY_AND_ASSIGN(SiteDetails);
 };
 
 #endif  // CHROME_BROWSER_SITE_DETAILS_H_