Add a snapshot of flutter/engine/src/build to our sdk

build/filename_rules.gypi

Index: build/filename_rules.gypi
diff --git a/build/filename_rules.gypi b/build/filename_rules.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..f67287fa9e9501af05b9a3212066d86b43751247
--- /dev/null
+++ b/build/filename_rules.gypi
@@ -0,0 +1,106 @@
+# Copyright (c) 2012 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.
+
+# This gypi file defines the patterns used for determining whether a
+# file is excluded from the build on a given platform.  It is
+# included by common.gypi for chromium_code.
+
+{
+  'target_conditions': [
+    ['OS!="win" or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_win(_browsertest|_unittest)?\\.(h|cc)$'],
+                    ['exclude', '(^|/)win/'],
+                    ['exclude', '(^|/)win_[^/]*\\.(h|cc)$'] ],
+    }],
+    ['OS!="mac" or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_(cocoa|mac)(_unittest)?\\.(h|cc|mm?)$'],
+                    ['exclude', '(^|/)(cocoa|mac)/'] ],
+    }],
+    ['OS!="ios" or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_ios(_unittest)?\\.(h|cc|mm?)$'],
+                    ['exclude', '(^|/)ios/'] ],
+    }],
+    ['(OS!="mac" and OS!="ios") or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '\\.mm?$' ] ],
+    }],
+    # Do not exclude the linux files on *BSD since most of them can be
+    # shared at this point.
+    # In case a file is not needed, it is going to be excluded later on.
+    # TODO(evan): the above is not correct; we shouldn't build _linux
+    # files on non-linux.
+    ['OS!="linux" and OS!="openbsd" and OS!="freebsd" or >(nacl_untrusted_build)==1', {
+      'sources/': [
+        ['exclude', '_linux(_unittest)?\\.(h|cc)$'],
+        ['exclude', '(^|/)linux/'],
+      ],
+    }],
+    ['OS!="android" or _toolset=="host" or >(nacl_untrusted_build)==1', {
+      'sources/': [
+        ['exclude', '_android(_unittest)?\\.(h|cc)$'],
+        ['exclude', '(^|/)android/'],
+      ],
+    }],
+    ['OS=="win" and >(nacl_untrusted_build)==0', {
+      'sources/': [
+        ['exclude', '_posix(_unittest)?\\.(h|cc)$'],
+        ['exclude', '(^|/)posix/'],
+      ],
+    }],
+    ['<(chromeos)!=1 or >(nacl_untrusted_build)==1', {
+      'sources/': [
+        ['exclude', '_chromeos(_unittest)?\\.(h|cc)$'],
+        ['exclude', '(^|/)chromeos/'],
+      ],
+    }],
+    ['>(nacl_untrusted_build)==0', {
+      'sources/': [
+        ['exclude', '_nacl(_unittest)?\\.(h|cc)$'],
+      ],
+    }],
+    ['OS!="linux" and OS!="openbsd" and OS!="freebsd" or >(nacl_untrusted_build)==1', {
+      'sources/': [
+        ['exclude', '_xdg(_unittest)?\\.(h|cc)$'],
+      ],
+    }],
+    ['<(use_x11)!=1 or >(nacl_untrusted_build)==1', {
+      'sources/': [
+        ['exclude', '_(x|x11)(_interactive_uitest|_unittest)?\\.(h|cc)$'],
+        ['exclude', '(^|/)x11_[^/]*\\.(h|cc)$'],
+        ['exclude', '(^|/)x11/'],
+        ['exclude', '(^|/)x/'],
+      ],
+    }],
+    ['<(toolkit_views)==0 or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_views(_browsertest|_unittest)?\\.(h|cc)$'] ]
+    }],
+    ['<(use_aura)==0 or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_aura(_browsertest|_unittest)?\\.(h|cc)$'],
+                    ['exclude', '(^|/)aura/'],
+      ]
+    }],
+    ['<(use_aura)==0 or <(use_x11)==0 or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_aurax11(_browsertest|_unittest)?\\.(h|cc)$'] ]
+    }],
+    ['<(use_aura)==0 or OS!="win" or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_aurawin\\.(h|cc)$'] ]
+    }],
+    ['<(use_aura)==0 or OS!="linux" or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_auralinux\\.(h|cc)$'] ]
+    }],
+    ['<(use_ash)==0 or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_ash(_browsertest|_unittest)?\\.(h|cc)$'],
+                    ['exclude', '(^|/)ash/'],
+      ]
+    }],
+    ['<(use_ash)==0 or OS!="win" or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_ashwin\\.(h|cc)$'] ]
+    }],
+    ['<(use_ozone)==0 or >(nacl_untrusted_build)==1', {
+      'sources/': [ ['exclude', '_ozone(_browsertest|_unittest)?\\.(h|cc)$'] ]
+    }],
+    ['<(use_pango)==0', {
+      'sources/': [ ['exclude', '(^|_)pango(_util|_browsertest|_unittest)?\\.(h|cc)$'], ],
+    }],
+  ]
+}