OWNERS files updated with latest COMPONENT and TEAMS.

This is CL is generated by a script. Data is pulled from
review conducted in Q2 2019. See https://tinyurl.com/yxau5sc4
for context.

Bug: 977050
Change-Id: Ic29adb553986138929c755ed797dc8aef131ce94
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1700962Reviewed-by: Mohsen Izadi <mohsen@chromium.org>
Reviewed-by: ssid <ssid@chromium.org>
Reviewed-by: Ben Greenstein <bengr@chromium.org>
Commit-Queue: Eric Foo <efoo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#681482}

chrome/browser/dom_distiller/OWNERS

 file://components/dom_distiller/OWNERS
+# COMPONENT: UI>Browser>ReaderMode

components/leveldb_proto/OWNERS

@@ -2,3 +2,4 @@ nyquist@chromium.org
 ssid@chromium.org
 
 # COMPONENT: Internals
+# TEAM: chromium-reviews@chromium.org

ui/touch_selection/OWNERS

 mohsen@chromium.org
+# COMPONENT: UI>Browser>Selection
+# TEAM: input-dev@chromium.org