Make hbos and hta rtcstats* OWNERS of webrtc/pc, not webrtc/api.

We were already OWNERS of these files, but when these files were moved
from webrtc/api/ to webrtc/pc/ and a new OWNERS file created our
ownership was accidentally not moved.

Becoming per-file=rtcstats* OWNER of webrtc/pc/ which includes:
 rtcstats_integrationtest.cc
 rtcstatscollector.cc
 rtcstatscollector.h
 rtcstatscollector_unittest.cc

Dropping ownership of webrtc/api/ which no longer includes any
rtcstats* files.

Already OWNER of all of webrtc/api/stats/ which includes:
 rtcstats.h
 rtcstats_objects.h
 rtcstatscollectorcallback.h
 rtcstatsreport.h

Already OWNER of all of webrtc/stats/ which includes:
 rtcstats.cc
 rtcstats_objects.cc
 rtcstats_unittest.cc
 rtcstatsreport.cc
 rtcstatsreport_unittest.cc

BUG=webrtc:7060
TBR=hta@webrtc.org, deadbeef@webrtc.org
NOTRY=True

Review-Url: https://codereview.webrtc.org/2726563002
Cr-Original-Commit-Position: refs/heads/master@{#16906}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 7562fc8adb09aa2fe1a8ca10b1ebf6b3e8beac07
diff --git a/api/OWNERS b/api/OWNERS
index 43e2cd6..3301ecb 100644
--- a/api/OWNERS
+++ b/api/OWNERS
@@ -7,9 +7,6 @@
 tommi@webrtc.org
 deadbeef@webrtc.org
 
-per-file rtcstats*=hbos@webrtc.org
-per-file rtcstats*=hta@webrtc.org
-
 # These are for the common case of adding or renaming files. If you're doing
 # structural changes, please get a review from a reviewer in this file.
 per-file *.gn=*
diff --git a/pc/OWNERS b/pc/OWNERS
index ef5aa39..f6ae01a 100644
--- a/pc/OWNERS
+++ b/pc/OWNERS
@@ -8,6 +8,9 @@
 sergeyu@chromium.org
 tommi@webrtc.org
 
+per-file rtcstats*=hbos@webrtc.org
+per-file rtcstats*=hta@webrtc.org
+
 # These are for the common case of adding or renaming files. If you're doing
 # structural changes, please get a review from a reviewer in this file.
 per-file *.gn=*