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

mojo/edk/embedder/platform_shared_buffer.cc

 // Copyright 2014 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 "mojo/edk/embedder/platform_shared_buffer.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 186 matching lines @@
   if (ro_shared_memory_) {
     base::AutoLock locker(lock_);
     base::SharedMemoryHandle handle;
     handle = base::SharedMemory::DuplicateHandle(ro_shared_memory_->handle());
     if (!handle.IsValid())
       return nullptr;
     return CreateFromSharedMemoryHandle(num_bytes_, true, handle);
   }
 
   base::SharedMemoryHandle handle;
-  bool success;
   {
     base::AutoLock locker(lock_);
-    success = shared_memory_->ShareReadOnlyToProcess(
-        base::GetCurrentProcessHandle(), &handle);
+    handle = shared_memory_->GetReadOnlyHandle();
   }
-  if (!success || !handle.IsValid())
+  if (!handle.IsValid())
     return nullptr;
 
   return CreateFromSharedMemoryHandle(num_bytes_, true, handle);
 }
 
 PlatformSharedBuffer::PlatformSharedBuffer(size_t num_bytes, bool read_only)
     : num_bytes_(num_bytes), read_only_(read_only) {}
 
 PlatformSharedBuffer::~PlatformSharedBuffer() {}
 
@@ skipping 108 matching lines @@
   base_ = static_cast<char*>(shared_memory_.memory()) + offset_rounding;
   return true;
 }
 
 void PlatformSharedBufferMapping::Unmap() {
   shared_memory_.Unmap();
 }
 
 }  // namespace edk
 }  // namespace mojo