Mojo: COMPILE_ASSERT -> static_assert in mojo/system and mojo/embedder.

mojo/system/handle_signals_state.h

 // 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.
 
 #ifndef MOJO_SYSTEM_HANDLE_SIGNALS_STATE_H_
 #define MOJO_SYSTEM_HANDLE_SIGNALS_STATE_H_
 
 #include "base/macros.h"
 #include "mojo/public/c/system/types.h"
 #include "mojo/system/system_impl_export.h"
@@ skipping 23 matching lines @@
   bool satisfies(MojoHandleSignals signals) const {
     return !!(satisfied_signals & signals);
   }
 
   bool can_satisfy(MojoHandleSignals signals) const {
     return !!(satisfiable_signals & signals);
   }
 
   // (Copy and assignment allowed.)
 };
-COMPILE_ASSERT(sizeof(HandleSignalsState) == sizeof(MojoHandleSignalsState),
-               HandleSignalsState_should_add_no_overhead);
+static_assert(sizeof(HandleSignalsState) == sizeof(MojoHandleSignalsState),
+              "HandleSignalsState should add no overhead");
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_SYSTEM_HANDLE_SIGNALS_STATE_H_