Folder shuffle  media/capture -> media/capture/content and media/video/capture -> media/capture/video

Folder reorg, no code changes whatsoever (except #include path
renaming).

Rationale: media/capture includes ATM screen/tab capture;
media/video has a bunch of unrelated files and a
large capture/ folder. All that can be consolidated under
media/capture/bla where bla={content, video}.

Suggestion: move audio capture code in capture/audio.

TBR=
avi@chromium.org for content/browser/DEPS since is a
mechanical folder name change.

Review URL: https://codereview.chromium.org/1231863011

Cr-Commit-Position: refs/heads/master@{#339199}

diff --git a/media/OWNERS b/media/OWNERS
index c992388..e65ac6fb 100644
--- a/media/OWNERS
+++ b/media/OWNERS

@@ -3,7 +3,7 @@
 # - cast
 # - midi
 # - ozone
-# - video/capture
+# - capture/{content,video}
 # Instead prefer the OWNERS in the subdirectory as they will be more familiar,
 # and to load balance. Only use OWNERS in this file for these subdirectories
 # when doing refactorings and general cleanups.