Allow cross-origin requests for relay http requests made in Transport API.

content/renderer/p2p/port_allocator.cc

Index: content/renderer/p2p/port_allocator.cc
diff --git a/content/renderer/p2p/port_allocator.cc b/content/renderer/p2p/port_allocator.cc
index 53753f59676950b0328a101d44329aa6cfcedaca..2146b9cc1a581353af1bf192d48ebf54eb85fe4c 100644
--- a/content/renderer/p2p/port_allocator.cc
+++ b/content/renderer/p2p/port_allocator.cc
@@ -177,8 +177,13 @@ void P2PPortAllocatorSession::AllocateRelaySession() {
 
   WebURLLoaderOptions options;
   options.allowCredentials = false;
+
+  // TODO(sergeyu): Set to CrossOriginRequestPolicyUseAccessControl
+  // when this code can be used by untrusted plugins.
+  // See http://crbug.com/104195 .
   options.crossOriginRequestPolicy =
-      WebURLLoaderOptions::CrossOriginRequestPolicyUseAccessControl;
+      WebURLLoaderOptions::CrossOriginRequestPolicyAllow;
+
   relay_session_request_.reset(
       allocator_->web_frame_->createAssociatedURLLoader(options));
   if (!relay_session_request_.get()) {