Adds the OCHamcrest library to the iOS build.

ios/chrome/tools/build/ios_copy_files.py

Index: ios/chrome/tools/build/ios_copy_files.py
diff --git a/ios/chrome/tools/build/ios_copy_files.py b/ios/chrome/tools/build/ios_copy_files.py
new file mode 100755
index 0000000000000000000000000000000000000000..1a5074ec86b9dc5481e17eb5e5ba0fdc5fe5792a
--- /dev/null
+++ b/ios/chrome/tools/build/ios_copy_files.py
@@ -0,0 +1,51 @@
+#!/usr/bin/env python
+# Copyright 2016 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 argparse
+import os
+import shutil
+import sys
+
+
+def DoMain(argv):
+  parser = argparse.ArgumentParser(description='Generate forwarding headers.')
+  parser.add_argument('-i', '--list-inputs', action='store_true',
+                      help='List input files and exit.')
+  parser.add_argument('-o', '--list-outputs', action='store_true',
+                      help='List output files and exit.')
+  parser.add_argument('-d', '--dest-dir', type=str,
+                      help=('Output directory for forwarding headers.'))
+  parser.add_argument('filenames', metavar='filename', type=str, nargs='+',
+                      help='Input filenames.')
+
+  args = parser.parse_args(argv)
+  if args.list_inputs:
+    return list_inputs(args.filenames)
+
+  if not args.dest_dir:
+    print '--dest-dir is required for this command.'
+    sys.exit(1)
+  if args.list_outputs:
+    return ' '.join(
+        os.path.join(args.dest_dir, os.path.basename(filename))
+        for filename in args.filenames)
+
+  if not os.path.isdir(args.dest_dir):
+    os.makedirs(args.dest_dir)
+  for filename in args.filenames:
+    target_filename = os.path.join(args.dest_dir, os.path.basename(filename))
+    if os.path.isfile(target_filename):
+      os.unlink(target_filename)
+    try:
+      os.link(filename, target_filename)
+    except OSError as e:
+      # Fallbacks to copy if hardlinking fails.
+      shutil.copy(filename, target_filename)
+
+
+if __name__ == '__main__':
+  results = DoMain(sys.argv[1:])
+  if results:
+    print results