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

mojo/edk/system/core.h

 // Copyright 2013 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.
 
 #ifndef MOJO_EDK_SYSTEM_CORE_H_
 #define MOJO_EDK_SYSTEM_CORE_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 212 matching lines @@
   friend bool internal::ShutdownCheckNoLeaks(Core*);
 
   // Internal implementation of |Wait()| and |WaitMany()|; doesn't do basic
   // validation of arguments. |*result_index| is only set if the result (whether
   // success or failure) applies to a specific handle, so its value should be
   // preinitialized to |static_cast<uint32_t>(-1)|.
   MojoResult WaitManyInternal(const MojoHandle* handles,
                               const MojoHandleSignals* signals,
                               uint32_t num_handles,
                               MojoDeadline deadline,
-                              uint32_t* result_index,
+                              uint64_t* result_index,
                               HandleSignalsState* signals_states);
 
   embedder::PlatformSupport* const platform_support_;
 
   // TODO(vtl): |handle_table_mutex_| should be a reader-writer lock (if only we
   // had them).
   util::Mutex handle_table_mutex_;
   HandleTable handle_table_ MOJO_GUARDED_BY(handle_table_mutex_);
 
   util::Mutex mapping_table_mutex_;
   MappingTable mapping_table_ MOJO_GUARDED_BY(mapping_table_mutex_);
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(Core);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_CORE_H_