[infra] Begin removing gyp

tools/gyp/all.gypi

-# Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
-
-# A set of variables needed to build some of the Chrome based subparts of the
-# Dart project. This is in no way a complete list of variables being defined
-# by Chrome, but just the minimally needed subset.
-{
-  'variables': {
-    'library': 'static_library',
-    'component': 'static_library',
-    'target_arch': 'ia32',
-    # Flag that tells us whether to build native support for dart:io.
-    'dart_io_support': 1,
-    # Flag that tells us whether this is an ASAN build.
-    'asan%': 0,
-    # Flag that tells us whether this is a MSAN build.
-    'msan%': 0,
-    # Flag that teslls us whether this is a TSAN build.
-    'tsan%': 0,
-  },
-  'conditions': [
-    [ 'OS=="linux"', {
-      'target_defaults': {
-        'ldflags': [ '-pthread', ],
-      },
-    }],
-    [ 'OS=="win"', {
-      'target_defaults': {
-        'msvs_cygwin_dirs': ['<(DEPTH)/third_party/cygwin'],
-      },
-      'includes': [
-        'msvs.gypi',
-      ],
-    }],
-    [ 'OS=="mac"', {
-      'includes': [
-        'xcode.gypi',
-      ],
-    }],
-  ],
-  'includes': [
-    'configurations.gypi',
-  ],
-}