Add fuzzer to test Fuzz URLRequestDataJob

net/url_request/url_request_test_util.h

Index: net/url_request/url_request_test_util.h
diff --git a/net/url_request/url_request_test_util.h b/net/url_request/url_request_test_util.h
index a18ef8ce1303a8bfc11779a9e95f59f0139cad2e..9561ddd4c320c6ada18348636be8d851144329ba 100644
--- a/net/url_request/url_request_test_util.h
+++ b/net/url_request/url_request_test_util.h
@@ -24,6 +24,7 @@
 #include "net/base/io_buffer.h"
 #include "net/base/load_timing_info.h"
 #include "net/base/net_errors.h"
+#include "net/base/net_export.h"
 #include "net/base/network_delegate_impl.h"
 #include "net/base/request_priority.h"
 #include "net/base/sdch_manager.h"
@@ -51,7 +52,7 @@ namespace net {
 
 //-----------------------------------------------------------------------------
 
-class TestURLRequestContext : public URLRequestContext {
+class NET_EXPORT_PRIVATE TestURLRequestContext : public URLRequestContext {
  public:
   TestURLRequestContext();
   // Default constructor like TestURLRequestContext() but does not call
@@ -139,7 +140,7 @@ class TestURLRequestContextGetter : public URLRequestContextGetter {
 
 //-----------------------------------------------------------------------------
 
-class TestDelegate : public URLRequest::Delegate {
+class NET_EXPORT_PRIVATE TestDelegate : public URLRequest::Delegate {
  public:
   TestDelegate();
   ~TestDelegate() override;