Convert Gamepad IPC messages into mojo interface.

device/gamepad/gamepad_provider.h

Index: device/gamepad/gamepad_provider.h
diff --git a/device/gamepad/gamepad_provider.h b/device/gamepad/gamepad_provider.h
index faed53d5bc883a9c51f987f244f44e516b0ec794..6b24340ad0baa47e7f4b4fb9a0f90507f6a5b539 100644
--- a/device/gamepad/gamepad_provider.h
+++ b/device/gamepad/gamepad_provider.h
@@ -58,6 +58,11 @@ class DEVICE_GAMEPAD_EXPORT GamepadProvider
   base::SharedMemoryHandle GetSharedMemoryHandleForProcess(
       base::ProcessHandle renderer_process);
 
+  // TODO(heke) Change to mojo::ScopedSharedBufferHandle GetSharedBufferHandle()
+  // See crbug/671928 for details.
+  // Returns the shared memory handle of the gamepad data.
+  base::SharedMemoryHandle GetSharedMemoryHandle();
+
   void AddGamepadDataFetcher(GamepadDataFetcher* fetcher);
   void RemoveGamepadDataFetcher(GamepadDataFetcher* fetcher);