WebUI: Compress local discovery UI

Bug: 965089
Change-Id: I9ecb68a507a98f02f2238d28feb6ff72da71f8ba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1875482Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709050}

chrome/browser/browser_resources.grd

@@ -279,9 +279,9 @@
       <include name="IDR_PREDICTORS_JS" file="resources\predictors\predictors.js" flattenhtml="true" type="BINDATA" compress="gzip" />
 
       <if expr="enable_service_discovery">
-        <include name="IDR_LOCAL_DISCOVERY_HTML" file="resources\local_discovery\local_discovery.html" flattenhtml="true" allowexternalscript="true" type="BINDATA" />
-        <include name="IDR_LOCAL_DISCOVERY_CSS" file="resources\local_discovery\local_discovery.css" flattenhtml="true" type="BINDATA" />
-        <include name="IDR_LOCAL_DISCOVERY_JS" file="resources\local_discovery\local_discovery.js" flattenhtml="true" type="BINDATA" />
+        <include name="IDR_LOCAL_DISCOVERY_HTML" file="resources\local_discovery\local_discovery.html" compress="gzip" flattenhtml="true" allowexternalscript="true" type="BINDATA" />
+        <include name="IDR_LOCAL_DISCOVERY_CSS" file="resources\local_discovery\local_discovery.css" compress="gzip" flattenhtml="true" type="BINDATA" />
+        <include name="IDR_LOCAL_DISCOVERY_JS" file="resources\local_discovery\local_discovery.js" compress="gzip" flattenhtml="true" type="BINDATA" />
       </if>
 
       <include name="IDR_LOCAL_STATE_HTML" file="resources\local_state\local_state.html" flattenhtml="true" allowexternalscript="true" type="BINDATA" compress="gzip" />