[TaskEnvironment] Mass-migrate away from ScopedTaskEnvironment

(second half of
 https://chromium-review.googlesource.com/c/chromium/src/+/1756247)

This is step #1 of the mass migration. Some of these will be
backported to SingleThreadTaskEnvironment in a later phase.

scoped_task_environment.h will also only move in a follow-up CL.

[email protected]

Bug: 992483
Change-Id: Ie80f083eeeb209180ab3c2884f1b566f73549cc6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1756248
Reviewed-by: Gabriel Charette <[email protected]>
Reviewed-by: Daniel Cheng <[email protected]>
Commit-Queue: Gabriel Charette <[email protected]>
Cr-Commit-Position: refs/heads/master@{#688142}
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 24f49ad..3ffb1e9 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -714,7 +714,7 @@
       'base::ScopedMockTimeMessageLoopTaskRunner',
       (
         'ScopedMockTimeMessageLoopTaskRunner is deprecated. Prefer',
-        'ScopedTaskEnvironment::TimeSource::MOCK_TIME. There are still a',
+        'TaskEnvironment::TimeSource::MOCK_TIME. There are still a',
         'few cases that may require a ScopedMockTimeMessageLoopTaskRunner',
         '(i.e. mocking the main MessageLoopForUI in browser_tests), but check',
         'with gab@ first if you think you need it)',