Temporarily allow IO when loading shared GSSAPI library

net/http/http_auth_gssapi_posix.cc

 // Copyright (c) 2010 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 "net/http/http_auth_gssapi_posix.h"
 
 #include <limits>
 #include <string>
 
 #include "base/base64.h"
 #include "base/file_path.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
+#include "base/thread_restrictions.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
 
 // These are defined for the GSSAPI library:
 // Paraphrasing the comments from gssapi.h:
 // "The implementation must reserve static storage for a
 // gss_OID_desc object for each constant.  That constant
 // should be initialized to point to that gss_OID_desc."
 namespace {
 
@@ skipping 413 matching lines @@
       "libgssapi.so.1"        // Heimdal - Suse9, CITI - FC, MDK, Suse10
 #endif
     };
     library_names = kDefaultLibraryNames;
     num_lib_names = arraysize(kDefaultLibraryNames);
   }
 
   for (size_t i = 0; i < num_lib_names; ++i) {
     const char* library_name = library_names[i];
     FilePath file_path(library_name);
+
+    // TODO(asanka): Move library loading to a separate thread.
+    //               http://crbug.com/66702
+    base::ThreadRestrictions::ScopedAllowIO allow_io_temporarily;
     base::NativeLibrary lib = base::LoadNativeLibrary(file_path);
     if (lib) {
       // Only return this library if we can bind the functions we need.
       if (BindMethods(lib))
         return lib;
       base::UnloadNativeLibrary(lib);
     }
   }
   LOG(WARNING) << "Unable to find a compatible GSSAPI library";
   return NULL;
@@ skipping 416 matching lines @@
   if (rv != OK) {
     LOG(ERROR) << "Problem initializing context. \n"
                << DisplayExtendedStatus(library_, major_status, minor_status)
                << '\n'
                << DescribeContext(library_, scoped_sec_context_.get());
   }
   return rv;
 }
 
 }  // namespace net