Revert of Flood-fill the canvas used for layout tests

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
diff --git a/tools/valgrind/memcheck/suppressions.txt b/tools/valgrind/memcheck/suppressions.txt
index 107032206c3062452fd03bd5d9e20d38234dfa83..1cfcdc0a29f60ce7d301d1f763bfa1660a6d35cc 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -6358,6 +6358,26 @@
    fun:_ZN3net14URLFetcherCore15StartOnIOThreadEv
 }
 {
+   bug_332271a
+   Memcheck:Param
+   write(buf)
+   obj:*libpthread*
+   fun:_ZN3IPC7Channel11ChannelImpl23ProcessOutgoingMessagesEv
+   fun:_ZN3IPC7Channel11ChannelImpl29OnFileCanWriteWithoutBlockingEi
+   fun:_ZN4base19MessagePumpLibevent21FileDescriptorWatcher29OnFileCanWriteWithoutBlocking*
+   fun:_ZN4base19MessagePumpLibevent22OnLibeventNotificationEisPv
+}
+{
+   bug_332271b
+   Memcheck:Param
+   write(buf)
+   obj:*libpthread*
+   fun:_ZN3IPC7Channel11ChannelImpl23ProcessOutgoingMessagesEv
+   fun:_ZN3IPC7Channel11ChannelImpl4SendEPNS_7MessageE
+   fun:_ZN3IPC7Channel4SendEPNS_7MessageE
+   fun:_ZN3IPC12ChannelProxy7Context13OnSendMessage*
+}
+{
    bug_332328
    Memcheck:Leak
    fun:malloc