Added a couple of TSAN suppressions

tools/valgrind/tsan/suppressions.txt

 ############################
 # Chromium
 
 {
   bug_15147
   ThreadSanitizer:Race
   ...
   fun:*URLRequestJobTracker*
 }
 
 {
   bug_21259
   ThreadSanitizer:Race
   ...
   fun:*tracked_objects*ThreadData*StartTracking*
 }
 
 {
   bug_21468
   ThreadSanitizer:Race
   ...
   fun:*net*DirectoryLister*
 }
 
 {
-  bug_21474
+  bug_22272
   ThreadSanitizer:Race
   ...
-  fun:*ibevent*
+  fun:*RefCounted*LoadLog*
 }
 
 {
   bug_22520
   ThreadSanitizer:Race
   fun:*CancelableRequestBase*
   fun:*CancelableRequest*
 }
 
 ############################
@@ skipping 40 matching lines @@
 }
 
 # TODO(timurrrr): bug item
 {
   Data race on vfptr in base/thread_unittest
   ThreadSanitizer:Race
   ...
   fun:*ThreadTest_SleepInsideInit*TestBody*
 }
 
+# TODO(timurrrr): bug item
+{
+  Data race on vfptr in ipc/ipc_sync_channel_unittest
+  ThreadSanitizer:Race
+  ...
+  fun:*STLDeleteContainerPointers*Worker*
+  ...
+  fun:*IPCSyncChannelTest*
+}
+
 ############################
 # Benign races in ICU
 {
   Two writes, same value (ICU gGlobalMutex, gMutexesInUse)
   ThreadSanitizer:Race
   fun:umtx_init_4_2
 }
 
 {
   Two writes, same value (ICU gHeapInUse)
   ThreadSanitizer:Race
   fun:uprv_malloc_4_2
 }
 
 ############################
 # Benign race in SQLLite
 {
   Two writes, same value (SQLLite pthreadMutexAlloc)
   ThreadSanitizer:Race
   ...
   fun:pthreadMutexAlloc
   fun:sqlite3MutexAlloc
 }