Add --headless flag to Windows

headless/public/util/generic_url_request_job.h

 // Copyright 2016 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.
 
 #ifndef HEADLESS_PUBLIC_UTIL_GENERIC_URL_REQUEST_JOB_H_
 #define HEADLESS_PUBLIC_UTIL_GENERIC_URL_REQUEST_JOB_H_
 
 #include <stddef.h>
 #include <functional>
 #include <memory>
@@ skipping 35 matching lines @@
   struct HttpResponse {
     GURL final_url;
     int http_response_code;
 
     // The HTTP headers and response body. Note the lifetime of |response_data|
     // is expected to outlive the GenericURLRequestJob.
     const char* response_data;  // NOT OWNED
     size_t response_data_size;
   };
 
-  class Delegate {
+  class HEADLESS_EXPORT Delegate {
    public:
     // Allows the delegate to rewrite the URL for a given request. Return true
     // to signal that the rewrite is in progress and |callback| will be called
     // with the result, or false to indicate that no rewriting is necessary.
     // Called on an arbitrary thread. |callback| can be called on any thread.
     virtual bool BlockOrRewriteRequest(const GURL& url,
                                        const std::string& devtools_id,
                                        const std::string& method,
                                        const std::string& referrer,
                                        RewriteCallback callback) = 0;
@@ skipping 73 matching lines @@
   base::TimeTicks response_time_;
 
   base::WeakPtrFactory<GenericURLRequestJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GenericURLRequestJob);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_PUBLIC_UTIL_GENERIC_URL_REQUEST_JOB_H_