Move third_party/mojo/src/mojo/public to mojo/public

mojo/public/platform/nacl/BUILD.gn

 # 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.
 
 assert(is_nacl)
 
 import("../../mojo_sdk.gni")
 
 # Untrusted code
 if (is_nacl) {
@@ skipping 11 matching lines @@
       "mojo_initial_handle.h",
       "mojo_main_thunk.cc",
     ]
 
     mojo_sdk_deps = [
       "mojo/public/c/system",
       "mojo/public/platform/nacl:mojo",
     ]
   }
 }