Set the target type when creating the request for main resource

Source/core/loader/FormSubmission.cpp

Index: Source/core/loader/FormSubmission.cpp
diff --git a/Source/core/loader/FormSubmission.cpp b/Source/core/loader/FormSubmission.cpp
index 8b6c22b22009bdf4d5b5dbe6a017a6e6987aadcb..74acc78415184a29f4b055d6af9f921a31991138 100644
--- a/Source/core/loader/FormSubmission.cpp
+++ b/Source/core/loader/FormSubmission.cpp
@@ -34,6 +34,7 @@
 #include "core/HTMLNames.h"
 #include "core/dom/Document.h"
 #include "core/events/Event.h"
+#include "core/frame/LocalFrame.h"
 #include "core/html/DOMFormData.h"
 #include "core/html/HTMLFormControlElement.h"
 #include "core/html/HTMLFormElement.h"
@@ -263,6 +264,10 @@ KURL FormSubmission::requestURL() const
 
 void FormSubmission::populateFrameLoadRequest(FrameLoadRequest& frameRequest)
 {
+    LocalFrame* frame = frameRequest.originDocument()->frame();
+    if (frame)
+        frameRequest.resourceRequest().initializeForMainResource(frame->isMainFrame());
+
     if (!m_target.isEmpty())
         frameRequest.setFrameName(m_target);