EDK: Change Awakable::Awake()'s context, etc., to be a uint64_t.

mojo/edk/system/data_pipe.h

Index: mojo/edk/system/data_pipe.h
diff --git a/mojo/edk/system/data_pipe.h b/mojo/edk/system/data_pipe.h
index 7ab0f3fb3906d3ddc05373c2708cf32757b94d53..c8af1c7283ed9865ca2b0533205c7a74a2240fff 100644
--- a/mojo/edk/system/data_pipe.h
+++ b/mojo/edk/system/data_pipe.h
@@ -116,7 +116,7 @@ class DataPipe final : public ChannelEndpointClient {
   HandleSignalsState ProducerGetHandleSignalsState();
   MojoResult ProducerAddAwakable(Awakable* awakable,
                                  MojoHandleSignals signals,
-                                 uint32_t context,
+                                 uint64_t context,
                                  HandleSignalsState* signals_state);
   void ProducerRemoveAwakable(Awakable* awakable,
                               HandleSignalsState* signals_state);
@@ -150,7 +150,7 @@ class DataPipe final : public ChannelEndpointClient {
   HandleSignalsState ConsumerGetHandleSignalsState();
   MojoResult ConsumerAddAwakable(Awakable* awakable,
                                  MojoHandleSignals signals,
-                                 uint32_t context,
+                                 uint64_t context,
                                  HandleSignalsState* signals_state);
   void ConsumerRemoveAwakable(Awakable* awakable,
                               HandleSignalsState* signals_state);