Switch to standard integer types in components/, part 2 of 4.

components/keyed_service/core/dependency_graph.cc

 // 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.
 
 #include "components/keyed_service/core/dependency_graph.h"
 
+#include <stddef.h>
+
 #include <algorithm>
 #include <deque>
 #include <iterator>
 
 #include "base/strings/string_piece.h"
 
 namespace {
 
 // Escapes |id| to be a valid ID in the DOT format [1]. This is implemented as
 // enclosing the string in quotation marks, and escaping any quotation marks
@@ skipping 160 matching lines @@
   }
 
   result.append("\n  /* Toplevel node */\n");
   result.append("  ");
   result.append(escaped_toplevel_name);
   result.append(" [shape=box];\n");
 
   result.append("}\n");
   return result;
 }