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

base/metrics/field_trial.cc

Index: base/metrics/field_trial.cc
diff --git a/base/metrics/field_trial.cc b/base/metrics/field_trial.cc
index dba659e5dd5a3277fd4617242cfd6a0d3b6edf0a..af83f63cc3abb6540817e281f9996234a737b418 100644
--- a/base/metrics/field_trial.cc
+++ b/base/metrics/field_trial.cc
@@ -221,10 +221,8 @@ HANDLE CreateReadOnlyHandle(FieldTrialList::FieldTrialAllocator* allocator) {
 
 #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