[Memory Sheriff] Suppression for URLRequestFtpJob

NOTRY=true
TBR=thestig@chromium.org,phajdan@chromium.org
BUG=238339

Review URL: https://chromiumcodereview.appspot.com/14800010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@198804 0039d316-1c4b-4281-b951-d872f2087c98

tools/heapcheck/suppressions.txt

@@ -1850,3 +1850,13 @@
    ...
    fun:ash::test::FocusCyclerTest_CycleFocusThroughWindowWithPanes_Test::TestBody
 }
+{
+   bug_238339
+   Heapcheck:Leak
+   ...
+   fun:net::ProxyService::ResolveProxy
+   fun:net::URLRequestFtpJob::Start
+   fun:net::URLRequest::StartJob
+   fun:net::URLRequest::BeforeRequestComplete
+   fun:net::URLRequest::Start
+}
\ No newline at end of file