Set the target type when creating the request for main resource

Source/platform/exported/WebURLRequest.cpp

Index: Source/platform/exported/WebURLRequest.cpp
diff --git a/Source/platform/exported/WebURLRequest.cpp b/Source/platform/exported/WebURLRequest.cpp
index f74541315816c78cb0be49ab80c035cb613f5eae..4572375971cb627bcf393a6c398ff0cba89c0da8 100644
--- a/Source/platform/exported/WebURLRequest.cpp
+++ b/Source/platform/exported/WebURLRequest.cpp
@@ -101,6 +101,11 @@ void WebURLRequest::assign(const WebURLRequest& r)
         assign(r.m_private ? new WebURLRequestPrivateImpl(r.m_private) : 0);
 }
 
+void WebURLRequest::initializeForMainResource(bool isMainFrame)
+{
+    m_private->m_resourceRequest->initializeForMainResource(isMainFrame);
+}
+
 bool WebURLRequest::isNull() const
 {
     return !m_private || m_private->m_resourceRequest->isNull();