Patch for bug 74983 (among others) to be applied to M11 696 branch.

tools/valgrind/tsan/suppressions.txt

 ############################
 # Chromium
 
 {
   bug_23433
   ThreadSanitizer:Race
   fun:*logging*SetMinLogLevel*
 }
 
 {
@@ skipping 87 matching lines @@
 {
   bug_67957
   ThreadSanitizer:Race
   fun:Replace_memcpy
   fun:memcpy
   fun:Serialize*
   fun:UserScriptMaster::ScriptReloader::RunScan*
 }
 
 {
-  bug_71695
-  ThreadSanitizer:Race
-  ...
-  fun:ServiceProcessState::TearDownState*
-  fun:ServiceProcessState::SignalStopped*
-}
-
-{
   bug_72169a
   ThreadSanitizer:Race
   fun:base::Thread::ThreadMain*
 }
 
 {
   bug_72169b
   ThreadSanitizer:Race
   fun:base::Thread::message_loop*
   ...
@@ skipping 377 matching lines @@
   tsanbug_62a
   ThreadSanitizer:Race
   fun:__memset_sse2
 }
 
 {
   tsanbug_62b
   ThreadSanitizer:Race
   fun:__GI_memcpy
 }