WebContents created via ctrl-click should be in a new process (target=_blank).

third_party/WebKit/Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
@@ skipping 894 matching lines @@
       page->GetChromeClient().Focus();
     return;
   }
 
   SetReferrerForFrameRequest(request);
 
   if (!target_frame && !request.FrameName().IsEmpty()) {
     if (policy == kNavigationPolicyDownload) {
       Client()->LoadURLExternally(request.GetResourceRequest(),
                                   kNavigationPolicyDownload, String(), false);
-    } else {
+      return;  // Navigation/download will be handled by the client.
+    } else if (ShouldNavigateTargetFrame(policy)) {
       request.GetResourceRequest().SetFrameType(
           WebURLRequest::kFrameTypeAuxiliary);
       CreateWindowForRequest(request, *frame_, policy);
+      return;  // Navigation will be handled by the new frame/window.
     }
-    return;
   }
 
   if (!frame_->IsNavigationAllowed())
     return;
 
   const KURL& url = request.GetResourceRequest().Url();
   FrameLoadType new_load_type = (frame_load_type == kFrameLoadTypeStandard)
                                     ? DetermineFrameLoadType(request)
                                     : frame_load_type;
   bool same_document_history_navigation =
@@ skipping 843 matching lines @@
   // TODO(japhet): This is needed because the browser process DCHECKs if the
   // first entry we commit in a new frame has replacement set. It's unclear
   // whether the DCHECK is right, investigate removing this special case.
   bool replace_current_item = load_type == kFrameLoadTypeReplaceCurrentItem &&
                               (!Opener() || !request.Url().IsEmpty());
   loader->SetReplacesCurrentHistoryItem(replace_current_item);
   return loader;
 }
 
 }  // namespace blink