Convert Gamepad IPC messages into mojo interface.

content/browser/gamepad/gamepad_service.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 "content/browser/gamepad/gamepad_service.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "content/browser/gamepad/gamepad_shared_buffer_impl.h"
+#include "content/common/gamepad_hardware_buffer.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "device/gamepad/gamepad_consumer.h"
 #include "device/gamepad/gamepad_data_fetcher.h"
 #include "device/gamepad/gamepad_provider.h"
 
 namespace content {
 
 namespace {
 GamepadService* g_gamepad_service = 0;
@@ skipping 122 matching lines @@
       it->consumer->OnGamepadDisconnected(index, pad);
   }
 }
 
 base::SharedMemoryHandle GamepadService::GetSharedMemoryHandleForProcess(
     base::ProcessHandle handle) {
   DCHECK(thread_checker_.CalledOnValidThread());
   return provider_->GetSharedMemoryHandleForProcess(handle);
 }
 
+mojo::ScopedSharedBufferHandle GamepadService::GetSharedMemoryHandle() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  // TODO(heke): Use mojo::SharedBuffer rather than base::Sharedmemory in
+  // GamepadSharedBuffer. See crbug.com/670655 for details.
+  return mojo::WrapSharedMemoryHandle(provider_->GetSharedMemoryHandle(),

[ke.he, 2016/12/06 09:51:27]

We add the "mojo::WrapSharedMemoryHandle(...)" here instead of adding it in
GamepadProvider because GamepadProvider is located in //device/ and cannot
"#include content/common/gamepad_hardware_buffer.h"

+                                      sizeof(GamepadHardwareBuffer),
+                                      true /* read_only */);
+}
+
 void GamepadService::OnUserGesture() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   gesture_callback_pending_ = false;
 
   if (!provider_ ||
       num_active_consumers_ == 0)
     return;
 
   for (ConsumerSet::iterator it = consumers_.begin();
@@ skipping 10 matching lines @@
       }
     }
   }
 }
 
 void GamepadService::SetSanitizationEnabled(bool sanitize) {
   provider_->SetSanitizationEnabled(sanitize);
 }
 
 }  // namespace content