Move existing kSitePerProcess checks to a policy-oracle object

content/renderer/render_frame_proxy.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 "content/renderer/render_frame_proxy.h"
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "content/child/webmessageportchannel_impl.h"
 #include "content/common/frame_messages.h"
 #include "content/common/frame_replication_state.h"
+#include "content/common/site_isolation_policy.h"
 #include "content/common/swapped_out_messages.h"
 #include "content/common/view_messages.h"
-#include "content/public/common/content_switches.h"
 #include "content/renderer/child_frame_compositing_helper.h"
 #include "content/renderer/render_frame_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
 namespace content {
@@ skipping 85 matching lines @@
   if (iter != g_frame_map.Get().end()) {
     RenderFrameProxy* proxy = iter->second;
     DCHECK_EQ(web_frame, proxy->web_frame());
     return proxy;
   }
   return NULL;
 }
 
 // static
 bool RenderFrameProxy::IsSwappedOutStateForbidden() {
-  return base::CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kSitePerProcess);
+  return SiteIsolationPolicy::AreCrossProcessFramesPossible();
 }
 
 RenderFrameProxy::RenderFrameProxy(int routing_id, int frame_routing_id)
     : routing_id_(routing_id),
       frame_routing_id_(frame_routing_id),
       web_frame_(NULL),
       render_view_(NULL) {
   std::pair<RoutingIDProxyMap::iterator, bool> result =
       g_routing_id_proxy_map.Get().insert(std::make_pair(routing_id_, this));
   CHECK(result.second) << "Inserting a duplicate item.";
@@ skipping 280 matching lines @@
       blink::WebUserGestureIndicator::isProcessingUserGesture();
   blink::WebUserGestureIndicator::consumeUserGesture();
   Send(new FrameHostMsg_OpenURL(routing_id_, params));
 }
 
 void RenderFrameProxy::forwardInputEvent(const blink::WebInputEvent* event) {
   Send(new FrameHostMsg_ForwardInputEvent(routing_id_, event));
 }
 
 }  // namespace