[TaskEnvironment] Complete migration with header rename

This is merely:

$ tools/git/move_source_file.py base/test/scoped_task_environment.h base/test/task_environment.h
$ tools/git/move_source_file.py base/test/scoped_task_environment.cc base/test/task_environment.cc
$ tools/git/move_source_file.py base/test/scoped_task_environment_unittest.cc base/test/task_environment_unittest.cc
$ tools/git/move_source_file.py content/public/test/test_browser_thread_bundle.h content/public/test/browser_task_environment.h
$ tools/git/move_source_file.py content/public/test/test_browser_thread_bundle.cc content/public/test/browser_task_environment.cc
$ tools/git/move_source_file.py content/public/test/test_browser_thread_bundle_unittest.cc content/public/test/browser_task_environment_unittest.cc
$ tools/git/move_source_file.py ios/web/public/test/test_web_thread_bundle.h ios/web/public/test/web_task_environment.h
$ tools/git/move_source_file.py ios/web/test/test_web_thread_bundle.cc ios/web/test/web_task_environment.cc

and a few manual renames in DEPS files missed by the script

This CL uses --bypass-hooks to avoid having to git cl format because
many headers are being reordered by git cl format and it's too many to
figure out in a no-op CL which ones are okay with it.
windows.h for one should typically be first and another one of the
reorderings in PS3 even caused a compile failure:
https://chromium-review.googlesource.com/c/chromium/src/+/1764962/3/components/services/font/font_loader_unittest.cc

TBR=dcheng@chromium.org

Bug: 992483
Change-Id: I32a4afd43ef779393c95d9873c157be2d3da1dd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1764962


Reviewed-by: Gabriel Charette <gab@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Gabriel Charette <gab@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#689778}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 18947083c7e75ec6d5e8c3b729515d83bde41c59