Set an empty HTTP origin header if needed in RenderFrame::willSendRequest

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 92e7367871040aa18c6a4c27ab77a3ff6f68fbff..be10babf0f58a6e806dbb782e5a0f370020ffd05 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -2418,6 +2418,10 @@ void RenderFrameImpl::willSendRequest(
                                WebString::fromUTF8(kDefaultAcceptHeader));
   }
 
+  // Add an empty HTTP origin header for non GET methods if none is currently
+  // present.
+  request.addHTTPOriginIfNeeded(WebString());
+
   // Attach |should_replace_current_entry| state to requests so that, should
   // this navigation later require a request transfer, all state is preserved
   // when it is re-created in the new process.