Replace base::SharedMemory read-only methods with GetReadOnlyHandle.

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 203 matching lines @@
   DWORD access = SECTION_MAP_READ | SECTION_QUERY;
   HANDLE dst;
   if (!::DuplicateHandle(process, src, process, &dst, access, true, 0))
     return kInvalidPlatformFile;
   return dst;
 }
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_NACL)
 int CreateReadOnlyHandle(FieldTrialList::FieldTrialAllocator* allocator) {
-  SharedMemoryHandle new_handle;
-  allocator->shared_memory()->ShareReadOnlyToProcess(GetCurrentProcessHandle(),
-                                                     &new_handle);
-  return SharedMemory::GetFdFromSharedMemoryHandle(new_handle);
+  SharedMemoryHandle handle = allocator->shared_memory()->GetReadOnlyHandle();
+  return SharedMemory::GetFdFromSharedMemoryHandle(handle);
 }
 #endif
 
 void OnOutOfMemory(size_t size) {
 #if defined(OS_NACL)
   NOTREACHED();
 #else
   TerminateBecauseOutOfMemory(size);
 #endif
 }
@@ skipping 1117 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