Add Network.setSendRequestIdHeader and use it in headless

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/loader/fetch/FetchUtils.h"
 
 #include "platform/HTTPNames.h"
 #include "platform/network/HTTPHeaderMap.h"
 #include "platform/network/HTTPParsers.h"
 #include "wtf/HashSet.h"
@@ skipping 74 matching lines @@
 bool FetchUtils::isSimpleHeader(const AtomicString& name,
                                 const AtomicString& value) {
   // http://fetch.spec.whatwg.org/#simple-header
   // "A simple header is a header whose name is either one of `Accept`,
   // `Accept-Language`, and `Content-Language`, or whose name is
   // `Content-Type` and value, once parsed, is one of
   // `application/x-www-form-urlencoded`, `multipart/form-data`, and
   // `text/plain`."
   // Treat 'Save-Data' as a simple header, since it is added by Chrome when
   // Data Saver feature is enabled.
-  // Treat inspector header as a simple header, since it is added by blink when
-  // inspector is open.
+  // Treat inspector headers as a simple headers, since they are added by blink
+  // when the inspector is open.
 
   if (equalIgnoringCase(name, "accept") ||
       equalIgnoringCase(name, "accept-language") ||
       equalIgnoringCase(name, "content-language") ||
       equalIgnoringCase(
           name, HTTPNames::X_DevTools_Emulate_Network_Conditions_Client_Id) ||
+      equalIgnoringCase(name, HTTPNames::X_DevTools_Request_Id) ||
       equalIgnoringCase(name, "save-data"))
     return true;
 
   if (equalIgnoringCase(name, "content-type"))
     return isSimpleContentType(value);
 
   return false;
 }
 
 bool FetchUtils::isSimpleContentType(const AtomicString& mediaType) {
@@ skipping 85 matching lines @@
 
 String FetchUtils::normalizeHeaderValue(const String& value) {
   // https://fetch.spec.whatwg.org/#concept-header-value-normalize
   // Strip leading and trailing whitespace from header value.
   // HTTP whitespace bytes are 0x09, 0x0A, 0x0D, and 0x20.
 
   return value.stripWhiteSpace(isHTTPWhitespace);
 }
 
 }  // namespace blink