cc: Implement overdraw feedback debugging feature.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index ffdf9a2f78148f65ef0611966dc01648a55f454a..4ddb1fa43383c7ee10518189f6d6de9e6ec4cc55 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -94268,6 +94268,7 @@ value.
   <int value="-1136509631" label="ssl-interstitial-v1"/>
   <int value="-1127996427" label="enable-files-details-panel"/>
   <int value="-1125133283" label="disable-threaded-scrolling"/>
+  <int value="-1119700637" label="ui-disable-partial-swap"/>
   <int value="-1107762575" label="enable-data-reduction-proxy-config-client"/>
   <int value="-1102212525" label="enable-tcp-fastopen"/>
   <int value="-1099142083" label="V8Ignition:disabled"/>
@@ -94787,6 +94788,7 @@ value.
   <int value="1272699563" label="enable-hosted-mode"/>
   <int value="1276209777" label="ntp-switch-to-existing-tab"/>
   <int value="1279584261" label="enable-carrier-switching"/>
+  <int value="1280614081" label="show-overdraw-feedback"/>
   <int value="1283960113" label="disable-fixed-position-compositing"/>
   <int value="1291966558" label="ScrollAnchoring:disabled"/>
   <int value="1294131571" label="disable-winrt-midi-api"/>