Add fuchsia binary size check script.

Bug: 1126177
Change-Id: I081553be89d56a872b4bb6e8c08f32c1fbb3544b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422889
Commit-Queue: Stephen Roe <steveroe@google.com>
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825494}

DEPS

@@ -1361,6 +1361,17 @@ deps = {
       'dep_type': 'cipd',
   },
 
+  'src/third_party/zstd': {
+      'packages': [
+          {
+              'package': 'fuchsia/third_party/zstd/linux-amd64',
+              'version': 'nVy-mclpAVYv0eyAe8SDxiE1g2UuafhnjOx2wr6vd_IC'
+          },
+      ],
+      'condition': 'host_os == "linux" and checkout_fuchsia',
+      'dep_type': 'cipd',
+  },
+
   'src/third_party/re2/src':
     Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + 'a84f9718f35f62ae2a7a32abb016a1fa9862346a',
 

build/fuchsia/binary_sizes_test.py

+#!/usr/bin/python
+# Copyright 2020 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.
+
+import copy
+import math
+import os
+import shutil
+import subprocess
+import tempfile
+import time
+import unittest
+
+import binary_sizes
+
+from common import DIR_SOURCE_ROOT
+
+
+class TestBinarySizes(unittest.TestCase):
+  tmpdir = None
+
+  @classmethod
+  def setUpClass(cls):
+    cls.tmpdir = tempfile.mkdtemp()
+
+  @classmethod
+  def tearDownClass(cls):
+    shutil.rmtree(cls.tmpdir)
+
+  # TODO(crbug.com/1145648): Add tests covering FAR file input and histogram
+  # output.
+
+  def testCommitFromBuildProperty(self):
+    commit_position = binary_sizes.CommitPositionFromBuildProperty(
+        'refs/heads/master@{#819458}')
+    self.assertEqual(commit_position, 819458)
+
+  def testCompressedSize(self):
+    """Verifies that the compressed file size can be extracted from the zstd
+    stderr output."""
+
+    uncompressed_file = tempfile.NamedTemporaryFile(delete=False)
+    for line in range(200):
+      uncompressed_file.write(
+          'Lorem ipsum dolor sit amet, consectetur adipiscing elit. '
+          'Sed eleifend')
+    uncompressed_file.close()
+    compressed_path = uncompressed_file.name + '.zst'
+    devnull = open(os.devnull)
+    zstd_path = os.path.join(DIR_SOURCE_ROOT, 'third_party', 'zstd', 'bin',
+                             'zstd')
+    subprocess.call(
+        [zstd_path, '-14', uncompressed_file.name, '-o', compressed_path],
+        stderr=devnull)
+    self.assertEqual(
+        binary_sizes.CompressedSize(uncompressed_file.name, ['-14']),
+        os.path.getsize(compressed_path))
+    os.remove(uncompressed_file.name)
+    os.remove(compressed_path)
+
+
+if __name__ == '__main__':
+  unittest.main()

third_party/.gitignore

@@ -256,3 +256,4 @@
 /xdg-utils
 /xstream/lib/
 /xulrunner-sdk
+/zstd