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

chrome/browser/extensions/api/web_request/web_request_apitest.cc

Index: chrome/browser/extensions/api/web_request/web_request_apitest.cc
diff --git a/chrome/browser/extensions/api/web_request/web_request_apitest.cc b/chrome/browser/extensions/api/web_request/web_request_apitest.cc
index b1fe296e10bccf64046e595e5e6d76f9d1563a32..9bbcc9d054b51304e7a0b3c7657445ad95c78526 100644
--- a/chrome/browser/extensions/api/web_request/web_request_apitest.cc
+++ b/chrome/browser/extensions/api/web_request/web_request_apitest.cc
@@ -499,16 +499,9 @@ IN_PROC_BROWSER_TEST_F(ExtensionWebRequestApiTest, ExtensionRequests) {
   listener_result.Reset();
   listener_main2.Reply("");
   EXPECT_TRUE(listener_result.WaitUntilSatisfied());
-  if (content::AreAllSitesIsolatedForTesting() ||
-      IsIsolateExtensionsEnabled()) {
-    // With --site-per-process, the extension frame does run in the extension's
-    // process.
-    EXPECT_EQ("Intercepted requests: ?contentscript",
-              listener_result.message());
-  } else {
-    EXPECT_EQ("Intercepted requests: ?contentscript, ?framescript",
-              listener_result.message());
-  }
+
+  // The extension frame does run in the extension's process.
+  EXPECT_EQ("Intercepted requests: ?contentscript", listener_result.message());
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionWebRequestApiTest, HostedAppRequest) {