[DRAFT] Create RenderFrameHostManager.

content/browser/loader/cross_site_resource_handler.cc

 // Copyright (c) 2012 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/browser/loader/cross_site_resource_handler.h"
 
 #include <string>
 
 #include "base/bind.h"
+#include "base/command_line.h"
 #include "base/logging.h"
 #include "content/browser/cross_site_request_manager.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/browser/loader/resource_request_info_impl.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/global_request_id.h"
 #include "content/public/browser/resource_controller.h"
+#include "content/public/common/content_switches.h"
 #include "content/public/common/resource_response.h"
+#include "content/public/common/url_constants.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request.h"
 
 namespace content {
 
 namespace {
 
 void OnCrossSiteResponseHelper(int render_view_id,
                                const GlobalRequestID& global_request_id,
                                bool is_transfer,
@@ skipping 53 matching lines @@
 
   ResourceRequestInfoImpl* info = GetRequestInfo();
 
   // We will need to swap processes if either (1) a redirect that requires a
   // transfer occurred before we got here, or (2) a pending cross-site request
   // was already in progress.  Note that a swap may no longer be needed if we
   // transferred back into the original process due to a redirect.
   bool should_transfer =
       GetContentClient()->browser()->ShouldSwapProcessesForRedirect(
           info->GetContext(), request()->original_url(), request()->url());
+
+  // When the --site-per-process flag is passed, we transfer processes for
+  // cross-site subframe navigations.
+  // TODO(creis): Skip this for chrome: pages for now, since they host cross
+  // site iframes and don't have referrers.
+  // TODO(creis): This doesn't work for hosted apps, due to passing NULL to
+  // IsSameWebSite.  It should be possible to always send the navigation to the
+  // UI thread to make a policy decision, which could let us eliminate the
+  // renderer-side check in RenderViewImpl::decidePolicyForNavigation as well.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess)) {
+    GURL referrer(request()->referrer());
+    if (info->GetResourceType() == ResourceType::SUB_FRAME &&
+        !request()->url().SchemeIs(chrome::kChromeUIScheme) &&
+        !SiteInstance::IsSameWebSite(NULL, request()->url(), referrer)) {
+      LOG(INFO) << "CSRH: Transferring for a cross-process subframe: " <<
+          request()->url();
+      should_transfer = true;
+    }
+  }
+
   bool swap_needed = should_transfer ||
       CrossSiteRequestManager::GetInstance()->
           HasPendingCrossSiteRequest(info->GetChildID(), info->GetRouteID());
 
   // If this is a download, just pass the response through without doing a
   // cross-site check.  The renderer will see it is a download and abort the
   // request.
   //
   // Similarly, HTTP 204 (No Content) responses leave us showing the previous
   // page.  We should allow the navigation to finish without running the unload
@@ skipping 150 matching lines @@
 }
 
 void CrossSiteResourceHandler::ResumeIfDeferred() {
   if (did_defer_) {
     did_defer_ = false;
     controller()->Resume();
   }
 }
 
 }  // namespace content