Invoke color_profile_manager via system Python on macOS.

Until a pyobjc wheel can be provided in Chrome Infra's vpython
environment, which will require a few more steps, manually run this
test with the system Python which has pyobjc built in.

This will allow vpython-as-python to be deployed everywhere, and then
more changes to be made on top.

TBR=ccameron@chromium.org

Bug: 776804, 804174, 812693
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: Ib6a3a19ff30f2ecb72f51a23ffa028b6789f3ddb
Reviewed-on: https://chromium-review.googlesource.com/924614
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537495}

content/test/gpu/gpu_tests/color_profile_manager.py

@@ -2,34 +2,16 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import atexit
+import os
+import subprocess
 import sys
 
-has_forced_srgb = False
-# Force all displays to use an sRGB color profile. By default, restore
-# them at exit.
+IMPL_PY = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(
+  __file__))), 'utilities', 'color_profile_manager_impl.py')
+
 def ForceUntilExitSRGB(skip_restoring_color_profile=False):
-  global has_forced_srgb
   if not sys.platform.startswith('darwin'):
     return
-  if has_forced_srgb:
-    return
-  has_forced_srgb = True
-
-  from gpu_tests import color_profile_manager_mac
-  # Record the current color profiles.
-  display_profile_url_map = \
-      color_profile_manager_mac.GetDisplaysToProfileURLMap()
-  # Force to sRGB.
-  for display_id in display_profile_url_map:
-    color_profile_manager_mac.SetDisplayCustomProfile(
-        display_id, color_profile_manager_mac.GetSRGBProfileURL())
-  # Register an atexit handler to restore the previous color profiles.
-  def Restore():
-    if skip_restoring_color_profile:
-      print "Skipping restoring the original color profile"
-      return
-    for display_id in display_profile_url_map:
-      color_profile_manager_mac.SetDisplayCustomProfile(
-          display_id, display_profile_url_map[display_id])
-  atexit.register(Restore)
+  # The Mac-specific Python packages used by the other scripts are only
+  # available via the system-installed Python.
+  subprocess.call(['/usr/bin/python', IMPL_PY])

content/test/gpu/utilities/color_profile_manager_impl.py

+# Copyright 2017 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 atexit
+import sys
+
+has_forced_srgb = False
+# Force all displays to use an sRGB color profile. By default, restore
+# them at exit.
+def ForceUntilExitSRGB(skip_restoring_color_profile=False):
+  global has_forced_srgb
+  if not sys.platform.startswith('darwin'):
+    return
+  if has_forced_srgb:
+    return
+  has_forced_srgb = True
+
+  import color_profile_manager_mac
+  # Record the current color profiles.
+  display_profile_url_map = \
+      color_profile_manager_mac.GetDisplaysToProfileURLMap()
+  # Force to sRGB.
+  for display_id in display_profile_url_map:
+    color_profile_manager_mac.SetDisplayCustomProfile(
+        display_id, color_profile_manager_mac.GetSRGBProfileURL())
+  # Register an atexit handler to restore the previous color profiles.
+  def Restore():
+    if skip_restoring_color_profile:
+      print "Skipping restoring the original color profile"
+      return
+    for display_id in display_profile_url_map:
+      color_profile_manager_mac.SetDisplayCustomProfile(
+          display_id, display_profile_url_map[display_id])
+  atexit.register(Restore)
+
+# If invoked as a top-level script, assume that we want to run
+# ForceUntilExitSRGB with skip_restoring_color_profile=True (which is
+# what all the tests in this directory want).
+def main():
+  ForceUntilExitSRGB(skip_restoring_color_profile=True)
+
+if __name__ == '__main__':
+  sys.exit(main())