Enable loading gssapi library for Chromad.

net/http/http_auth_gssapi_posix.h

Index: net/http/http_auth_gssapi_posix.h
diff --git a/net/http/http_auth_gssapi_posix.h b/net/http/http_auth_gssapi_posix.h
index 18cccebf8454fc0f621a48b63d8ad0e34f0ff00c..f861c67c91fead26944dedda02057b60dbf066da 100644
--- a/net/http/http_auth_gssapi_posix.h
+++ b/net/http/http_auth_gssapi_posix.h
@@ -108,7 +108,8 @@ class NET_EXPORT_PRIVATE GSSAPISharedLibrary : public GSSAPILibrary {
  public:
   // If |gssapi_library_name| is empty, hard-coded default library names are
   // used.
-  explicit GSSAPISharedLibrary(const std::string& gssapi_library_name);
+  explicit GSSAPISharedLibrary(const std::string& gssapi_library_name,
+                               bool allow_gssapi_library_load);
   ~GSSAPISharedLibrary() override;
 
   // GSSAPILibrary methods:
@@ -186,6 +187,7 @@ class NET_EXPORT_PRIVATE GSSAPISharedLibrary : public GSSAPILibrary {
   bool initialized_;
 
   std::string gssapi_library_name_;
+  bool allow_gssapi_library_load_;
   // Need some way to invalidate the library.
   base::NativeLibrary gssapi_library_;