Coverity: fix possible library leak in GSSAPISharedLibrary::LoadSharedLibrary.

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 "base/base64.h"
 #include "base/file_path.h"
@@ skipping 62 matching lines @@
     "libgssapi.so.4",       // Heimdal
     "libgssapi.so.1"        // Heimdal
 #endif
   };
   static size_t num_lib_names = arraysize(kLibraryNames);
 
   for (size_t i = 0; i < num_lib_names; ++i) {
     const char* library_name = kLibraryNames[i];
     FilePath file_path(library_name);
     base::NativeLibrary lib = base::LoadNativeLibrary(file_path);
-    // Only return this library if we can bind the functions we need.
-    if (lib && BindMethods(lib))
-      return lib;
+    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;
 }
 
 #define BIND(lib, x) \
   gss_##x##_type x = reinterpret_cast<gss_##x##_type>( \
       base::GetFunctionPointerFromNativeLibrary(lib, "gss_" #x)); \
   if (x == NULL) { \
     LOG(WARNING) << "Unable to bind function \"" << "gss_" #x << "\""; \
@@ skipping 408 matching lines @@
                << DisplayExtendedStatus(library_,
                                         major_status,
                                         minor_status);
     return ERR_UNEXPECTED;
   }
 
   return OK;
 }
 
 }  // namespace net
-