Add Network.setSendRequestIdHeader and use it in headless

third_party/WebKit/Source/platform/loader/fetch/RawResourceTest.cpp

 /*
  * Copyright (c) 2013, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 561 matching lines @@
 
 TEST_F(RawResourceTest,
        CanReuseDevToolsEmulateNetworkConditionsClientIdHeader) {
   ResourceRequest request("data:text/html,");
   request.setHTTPHeaderField(
       HTTPNames::X_DevTools_Emulate_Network_Conditions_Client_Id, "Foo");
   Resource* raw = RawResource::create(request, Resource::Raw);
   EXPECT_TRUE(raw->canReuse(ResourceRequest("data:text/html,")));
 }
 
+TEST_F(RawResourceTest, CanReuseDevToolsRequestIdHeader) {
+  ResourceRequest request("data:text/html,");
+  request.setHTTPHeaderField(HTTPNames::X_DevTools_Request_Id, "12345");
+  Resource* raw = RawResource::create(request, Resource::Raw);
+  EXPECT_TRUE(raw->canReuse(ResourceRequest("data:text/html,")));
+}
+
 }  // namespace blink