Update dpranke entries in OWNERS files.

This CL removes me from ownership from a few Blink-related
directories, as I'm really not qualified to be an owner there
any more, and also removes me as an OWNER for the top-level
and blink-level PRESUBMIT.py files in favor of dcheng, who is
a much better reviewer for the typical presubmit change these
days.

R=dcheng@chromium.org
TBR=jam@chromium.org

Change-Id: Ie3dbe9c31b3052521fedf4ac6164942f9904671c
Reviewed-on: https://chromium-review.googlesource.com/706186
Commit-Queue: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#507397}

OWNERS

@@ -19,7 +19,7 @@ per-file AUTHORS=*
 per-file BUILD.gn=file://build/OWNERS
 per-file codereview.settings=agable@chromium.org
 per-file DEPS=*
-per-file PRESUBMIT*.py=dpranke@chromium.org
+per-file PRESUBMIT*.py=dcheng@chromium.org
 per-file PRESUBMIT*.py=jochen@chromium.org
 per-file PRESUBMIT*.py=phajdan.jr@chromium.org
 per-file README.md=*

content/shell/test_runner/OWNERS

@@ -1,5 +1,4 @@
 dmazzoni@chromium.org
-dpranke@chromium.org
 mkwst@chromium.org
 pfeldman@chromium.org
 rbyers@chromium.org

third_party/WebKit/OWNERS

@@ -5,7 +5,7 @@ file://third_party/WebKit/API_OWNERS
 dpranke@chromium.org
 thakis@chromium.org
 
-per-file PRESUBMIT*.py=dpranke@chromium.org
+per-file PRESUBMIT*.py=dcheng@chromium.org
 per-file PRESUBMIT*.py=foolip@chromium.org
 per-file PRESUBMIT*.py=qyearsley@chromium.org
 per-file PRESUBMIT*.py=thakis@chromium.org

third_party/WebKit/Source/core/OWNERS

@@ -16,7 +16,6 @@ dglazkov@chromium.org
 dtapuska@chromium.org
 dgozman@chromium.org
 dominicc@chromium.org
-dpranke@chromium.org
 # drott reviews font specific changes.
 drott@chromium.org
 dsinclair@chromium.org