[headless] Remove default browser context.

headless/lib/browser/headless_url_request_context_getter.h

Index: headless/lib/browser/headless_url_request_context_getter.h
diff --git a/headless/lib/browser/headless_url_request_context_getter.h b/headless/lib/browser/headless_url_request_context_getter.h
index 5556ef19126793e566add7c9192320a0b3206b36..166f6a9cbe6c4d0b37001831df20eafcc6895021 100644
--- a/headless/lib/browser/headless_url_request_context_getter.h
+++ b/headless/lib/browser/headless_url_request_context_getter.h
@@ -6,6 +6,7 @@
 #define HEADLESS_LIB_BROWSER_HEADLESS_URL_REQUEST_CONTEXT_GETTER_H_
 
 #include <memory>
+#include <string>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
@@ -33,6 +34,7 @@ class URLRequestContextStorage;
 }
 
 namespace headless {
+class HeadlessBrowserContextOptions;
 
 class HeadlessURLRequestContextGetter : public net::URLRequestContextGetter {
  public:
@@ -42,7 +44,7 @@ class HeadlessURLRequestContextGetter : public net::URLRequestContextGetter {
       content::ProtocolHandlerMap* protocol_handlers,
       ProtocolHandlerMap context_protocol_handlers,
       content::URLRequestInterceptorScopedVector request_interceptors,
-      HeadlessBrowser::Options* options);
+      HeadlessBrowserContextOptions* options);
 
   // net::URLRequestContextGetter implementation:
   net::URLRequestContext* GetURLRequestContext() override;