tools/gn: Remove includes of basictypes.h.

tools/gn/args.h

 // Copyright (c) 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 TOOLS_GN_ARGS_H_
 #define TOOLS_GN_ARGS_H_
 
-#include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
+#include "base/macros.h"
 #include "base/synchronization/lock.h"
-#include "tools/gn/err.h"
 #include "tools/gn/scope.h"
 
+class Err;
+
 extern const char kBuildArgs_Help[];
 
 // Manages build arguments. It stores the global arguments specified on the
 // command line, and sets up the root scope with the proper values.
 //
 // This class tracks accesses so we can report errors about unused variables.
 // The use case is if the user specifies an override on the command line, but
 // no buildfile actually uses that variable. We want to be able to report that
 // the argument was unused.
 class Args {
@@ skipping 70 matching lines @@
   // check for overrides that were specified but never used.
   mutable Scope::KeyValueMap all_overrides_;
 
   // Maps from Settings (which corresponds to a toolchain) to the map of
   // declared variables. This is used to tracks all variables declared in any
   // buildfile. This is so we can see if the user set variables on the command
   // line that are not used anywhere. Each map is toolchain specific as each
   // toolchain may define variables in different locations.
   mutable DeclaredArgumentsPerToolchain declared_arguments_per_toolchain_;
 
-  Args& operator=(const Args& other);  // Disallow assignment.

[brettw, 2015/08/09 17:15:18]

Ah yeah, I used to copy this around, but all that got removed. Thanks for
noticing this can be simplified.

+  DISALLOW_ASSIGN(Args);
 };
 
 #endif  // TOOLS_GN_ARGS_H_