Revert of Preserving Content-Type header from http request in OpenURL path.

content/browser/frame_host/render_frame_host_manager.cc

Index: content/browser/frame_host/render_frame_host_manager.cc
diff --git a/content/browser/frame_host/render_frame_host_manager.cc b/content/browser/frame_host/render_frame_host_manager.cc
index a8776d8dadf1074b8efa98885bd1f2b42422c9eb..0c8774813268c53b597ff13e80bba4e57c5b21b6 100644
--- a/content/browser/frame_host/render_frame_host_manager.cc
+++ b/content/browser/frame_host/render_frame_host_manager.cc
@@ -456,14 +456,6 @@ void RenderFrameHostManager::OnCrossSiteResponse(
   std::vector<GURL> rest_of_chain = transfer_url_chain;
   rest_of_chain.pop_back();
 
-  // |extra_headers| passed to RequestTransferURL below are always empty for
-  // now, because there are no known scenarios where headers (from POST request
-  // made from one renderer) need to be forwarded into the renderer where that
-  // request ends up being transfered to.  In particular, XSSAuditor doesn't
-  // look at the headers (e.g. the Content-Type header) when analyzing the body
-  // of the POST request.
-  std::string extra_headers;
-
   transferring_render_frame_host->frame_tree_node()
       ->navigator()
       ->RequestTransferURL(
@@ -471,7 +463,7 @@ void RenderFrameHostManager::OnCrossSiteResponse(
           referrer, page_transition, global_request_id,
           should_replace_current_entry,
           transfer_navigation_handle_->IsPost() ? "POST" : "GET",
-          transfer_navigation_handle_->resource_request_body(), extra_headers);
+          transfer_navigation_handle_->resource_request_body());
 
   // If the navigation continued, the NavigationHandle should have been
   // transfered to a RenderFrameHost. In the other cases, it should be cleared.