Move existing kSitePerProcess checks to a policy-oracle object

extensions/renderer/dispatcher.cc

 // Copyright 2014 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.
 
 #include "extensions/renderer/dispatcher.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics_action.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "content/grit/content_resources.h"
 #include "content/public/child/v8_value_converter.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/common/site_isolation_policy.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_thread.h"
 #include "extensions/common/api/messaging/message.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension_api.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/common/extension_urls.h"
 #include "extensions/common/feature_switch.h"
 #include "extensions/common/features/feature.h"
@@ skipping 434 matching lines @@
       "extensionViewInternal", IDR_EXTENSION_VIEW_INTERNAL_CUSTOM_BINDINGS_JS));
   resources.push_back(std::make_pair("guestView", IDR_GUEST_VIEW_JS));
   resources.push_back(std::make_pair("guestViewAttributes",
                                      IDR_GUEST_VIEW_ATTRIBUTES_JS));
   resources.push_back(std::make_pair("guestViewContainer",
                                      IDR_GUEST_VIEW_CONTAINER_JS));
   resources.push_back(std::make_pair("guestViewDeny", IDR_GUEST_VIEW_DENY_JS));
   resources.push_back(std::make_pair("guestViewEvents",
                                      IDR_GUEST_VIEW_EVENTS_JS));
 
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          ::switches::kSitePerProcess)) {
+  if (content::SiteIsolationPolicy::AreCrossProcessFramesPossible()) {
     resources.push_back(std::make_pair("guestViewIframe",
                                        IDR_GUEST_VIEW_IFRAME_JS));
     resources.push_back(std::make_pair("guestViewIframeContainer",
                                        IDR_GUEST_VIEW_IFRAME_CONTAINER_JS));
   }
 
   resources.push_back(std::make_pair("imageUtil", IDR_IMAGE_UTIL_JS));
   resources.push_back(std::make_pair("json_schema", IDR_JSON_SCHEMA_JS));
   resources.push_back(std::make_pair("lastError", IDR_LAST_ERROR_JS));
   resources.push_back(std::make_pair("messaging", IDR_MESSAGING_JS));
@@ skipping 23 matching lines @@
                                      IDR_WEB_VIEW_ACTION_REQUESTS_JS));
   resources.push_back(std::make_pair("webViewApiMethods",
                                      IDR_WEB_VIEW_API_METHODS_JS));
   resources.push_back(std::make_pair("webViewAttributes",
                                      IDR_WEB_VIEW_ATTRIBUTES_JS));
   resources.push_back(std::make_pair("webViewConstants",
                                      IDR_WEB_VIEW_CONSTANTS_JS));
   resources.push_back(std::make_pair("webViewEvents", IDR_WEB_VIEW_EVENTS_JS));
   resources.push_back(std::make_pair("webViewInternal",
                                      IDR_WEB_VIEW_INTERNAL_CUSTOM_BINDINGS_JS));
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          ::switches::kSitePerProcess)) {
+  if (content::SiteIsolationPolicy::AreCrossProcessFramesPossible()) {
     resources.push_back(std::make_pair("webViewIframe",
                                        IDR_WEB_VIEW_IFRAME_JS));
   }
   resources.push_back(
       std::make_pair(mojo::kBindingsModuleName, IDR_MOJO_BINDINGS_JS));
   resources.push_back(
       std::make_pair(mojo::kBufferModuleName, IDR_MOJO_BUFFER_JS));
   resources.push_back(
       std::make_pair(mojo::kCodecModuleName, IDR_MOJO_CODEC_JS));
   resources.push_back(
@@ skipping 893 matching lines @@
       context->GetAvailability("surfaceWorkerInternal").is_available()) {
     module_system->Require("surfaceWorker");
   }
 
   // Require WebView.
   if (context->GetAvailability("webViewInternal").is_available()) {
     module_system->Require("webView");
     module_system->Require("webViewApiMethods");
     module_system->Require("webViewAttributes");
 
-    if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-            ::switches::kSitePerProcess)) {
+    if (content::SiteIsolationPolicy::AreCrossProcessFramesPossible()) {
       module_system->Require("webViewIframe");
     }
   }
 
   // The "guestViewDeny" module must always be loaded last. It registers
   // error-providing custom elements for the GuestView types that are not
   // available, and thus all of those types must have been checked and loaded
   // (or not loaded) beforehand.
   if (context_type == Feature::BLESSED_EXTENSION_CONTEXT) {
     module_system->Require("guestViewDeny");
   }
 }
 
 }  // namespace extensions