Improve process launch handle sharing API.

base/metrics/field_trial.h

 // 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.
 
 // FieldTrial is a class for handling details of statistical experiments
 // performed by actual users in the field (i.e., in a shipped or beta product).
 // All code is called exclusively on the UI thread currently.
 //
 // The simplest example is an experiment to see whether one of two options
 // produces "better" results across our user population.  In that scenario, UMA
@@ skipping 550 matching lines @@
   static void CreateFeaturesFromCommandLine(
       const base::CommandLine& command_line,
       const char* enable_features_switch,
       const char* disable_features_switch,
       FeatureList* feature_list);
 
 #if defined(OS_WIN)
   // On Windows, we need to explicitly pass down any handles to be inherited.
   // This function adds the shared memory handle to field trial state to the
   // list of handles to be inherited.
-  static void AppendFieldTrialHandleIfNeeded(
-      base::HandlesToInheritVector* handles);
+  static void AppendFieldTrialHandleIfNeeded(std::vector<HANDLE>* handles);
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_NACL)
   // On POSIX, we also need to explicitly pass down this file descriptor that
   // should be shared with the child process. Returns an invalid handle if it
   // was not initialized properly.
   static base::SharedMemoryHandle GetFieldTrialHandle();
 #endif
 
   // Adds a switch to the command line containing the field trial state as a
@@ skipping 173 matching lines @@
 
   // Tracks whether CreateTrialsFromCommandLine() has been called.
   bool create_trials_from_command_line_called_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(FieldTrialList);
 };
 
 }  // namespace base
 
 #endif  // BASE_METRICS_FIELD_TRIAL_H_