Get rid of all pid references from base::SharedMemoryHandle.

base/metrics/field_trial.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 "base/metrics/field_trial.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/base_switches.h"
@@ skipping 1119 matching lines @@
   }
   return entries;
 }
 
 #if defined(OS_WIN)
 // static
 bool FieldTrialList::CreateTrialsFromHandleSwitch(
     const std::string& handle_switch) {
   int field_trial_handle = std::stoi(handle_switch);
   HANDLE handle = reinterpret_cast<HANDLE>(field_trial_handle);
-  SharedMemoryHandle shm_handle(handle, GetCurrentProcId());
+  SharedMemoryHandle shm_handle(handle);
   return FieldTrialList::CreateTrialsFromSharedMemoryHandle(shm_handle);
 }
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_NACL)
 // static
 bool FieldTrialList::CreateTrialsFromDescriptor(int fd_key) {
   if (!kUseSharedMemoryForFieldTrials)
     return false;
 
@@ skipping 202 matching lines @@
     return;
   }
   AutoLock auto_lock(global_->lock_);
   CHECK(!global_->PreLockedFind(trial->trial_name())) << trial->trial_name();
   trial->AddRef();
   trial->SetTrialRegistered();
   global_->registered_[trial->trial_name()] = trial;
 }
 
 }  // namespace base