mojo/gpu: use SharedBuffer instead of base::SharedMemory with hacks

mojo/services/gles2/command_buffer_type_conversions.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/services/gles2/command_buffer_type_conversions.h"
 
-#include <string.h>
-
 #include "mojo/services/gles2/command_buffer.mojom.h"
 
 namespace mojo {
 
-COMPILE_ASSERT(sizeof(base::SharedMemoryHandle) <= sizeof(uint64_t),
-               mojo_ShmHandle_too_small_for_base_SharedMemoryHandle);
-
-ShmHandle TypeConverter<ShmHandle, base::SharedMemoryHandle>::ConvertFrom(
-    const base::SharedMemoryHandle& input,
-    Buffer* buffer) {
-  ShmHandle::Builder result(buffer);
-  uint64_t handle = 0;
-  memcpy(&handle, &input, sizeof(input));
-  result.set_handle_hack(handle);
-  return result.Finish();
-}
-
-base::SharedMemoryHandle
-TypeConverter<ShmHandle, base::SharedMemoryHandle>::ConvertTo(
-    const ShmHandle& input) {
-  base::SharedMemoryHandle output;
-  uint64_t handle = input.handle_hack();
-  memcpy(&output, &handle, sizeof(output));
-  return output;
-}
-
 CommandBufferState
 TypeConverter<CommandBufferState, gpu::CommandBuffer::State>::ConvertFrom(
     const gpu::CommandBuffer::State& input,
     Buffer* buffer) {
   CommandBufferState::Builder result(buffer);
   result.set_num_entries(input.num_entries);
   result.set_get_offset(input.get_offset);
   result.set_put_offset(input.put_offset);
   result.set_token(input.token);
   result.set_error(input.error);
@@ skipping 11 matching lines @@
   state.put_offset = input.put_offset();
   state.token = input.token();
   state.error = static_cast<gpu::error::Error>(input.error());
   state.context_lost_reason =
       static_cast<gpu::error::ContextLostReason>(input.context_lost_reason());
   state.generation = input.generation();
   return state;
 }
 
 }  // namespace mojo