Make GlobalDescriptors::MaybeGet return -1 when the key is not found.

base/win/scoped_process_information_unittest.cc

 // Copyright (c) 2012 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 <windows.h>
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/process_util.h"
 #include "base/test/multiprocess_test.h"
 #include "base/win/scoped_process_information.h"
 #include "testing/multiprocess_func_list.h"
 
 class ScopedProcessInformationTest : public base::MultiProcessTest {
  protected:
   void DoCreateProcess(const std::string& main_id,
                        PROCESS_INFORMATION* process_handle);
 };
 
-MULTIPROCESS_TEST_MAIN(ReturnSeven) {
+MULTIPROCESS_TEST_MAIN(ReturnSeven, NULL) {
   return 7;
 }
 
-MULTIPROCESS_TEST_MAIN(ReturnNine) {
+MULTIPROCESS_TEST_MAIN(ReturnNine, NULL) {
   return 9;
 }
 
 void ScopedProcessInformationTest::DoCreateProcess(
     const std::string& main_id, PROCESS_INFORMATION* process_handle) {
   std::wstring cmd_line =
       this->MakeCmdLine(main_id, false).GetCommandLineString();
   STARTUPINFO startup_info = {};
   startup_info.cb = sizeof(startup_info);
 
@@ skipping 136 matching lines @@
   ASSERT_TRUE(base::WaitForExitCode(nine_to_seven_info.TakeProcessHandle(),
                                     &exit_code));
   ASSERT_EQ(7, exit_code);
 
 }
 
 TEST_F(ScopedProcessInformationTest, InitiallyInvalid) {
   base::win::ScopedProcessInformation process_info;
   ASSERT_FALSE(process_info.IsValid());
 }