Clean-up suppressions: remove duplicates from TSan/Mac and TSan/Linux, move a bunch of suppressio...

tools/valgrind/memcheck/suppressions.txt

 # There are four kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 4287 matching lines @@
    fun:_ZN3IPC11SyncChannelC1ERKNS_13ChannelHandleENS_7Channel4ModeEPNS4_8ListenerEPN4base16MessageLoopProxyEbPNS8_13WaitableEventE
    fun:_ZN16ServiceIPCServer13CreateChannelEv
    fun:_ZN16ServiceIPCServer4InitEv
    fun:_ZN14ServiceProcess10InitializeEP16MessageLoopForUIRK11CommandLineP19ServiceProcessState
    fun:_Z18ServiceProcessMainRK18MainFunctionParams
    ...
    fun:ChromeMain
    fun:main
 }
 {
+   bug_93932
+   Memcheck:Overlap
+   fun:memcpy
+   fun:vp8_decode_update_thread_context
+   ...
+   fun:avcodec_decode_video2
+   fun:_ZN5media23FFmpegVideoDecodeEngine11DecodeFrameE13scoped_refptrINS_6BufferEE
+   fun:_ZN5media23FFmpegVideoDecodeEngine18ConsumeVideoSampleE13scoped_refptrINS_6BufferEE
+   fun:_ZN5media18FFmpegVideoDecoder18OnReadCompleteTaskE13scoped_refptrINS_6BufferEE
+}
+{
    bug_94195
    Memcheck:Leak
    ...
    fun:_ZN12GpuBlacklist16LoadGpuBlacklistERKSsNS_8OsFilterE
 }
 {
    bug_94345
    Memcheck:Leak
    fun:_Znw*
    fun:_ZNK4base8internal18WeakReferenceOwner6GetRefEv
@@ skipping 865 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }