Update the TSan v2 suppressions for issue 46840:

 - remove the suppressions that won't be needed after https://codereview.chromium.org/23602005/ is landed
 - add a suppression for race in base::HistogramSamples::IncreaseSum
Suppress a race in media::TestInputCallback::OnData (issue 239359)

BUG=46840,239359
TBR=jar@chromium.org,timurrrr@chromium.org

Review URL: https://codereview.chromium.org/23477019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221357 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/tsan_v2/suppressions.txt

@@ -13,8 +13,7 @@ race:base/threading/watchdog_unittest.cc
 race:libevent/event.c
 
 # http://crbug.com/46840
-race:history::HistoryBackend::DeleteFTSIndexDatabases
-race:history::InMemoryHistoryBackend::Init
+race:base::HistogramSamples::IncreaseSum
 
 # http://crbug.com/84094
 race:sqlite3StatusSet
@@ -63,6 +62,9 @@ race:PassRefPtr
 # http://crbug.com/224617
 race:base::debug::TraceEventTestFixture_TraceSampling_Test::TestBody
 
+# http://crbug.com/239359
+race:media::TestInputCallback::OnData
+
 # http://crbug.com/244368
 race:skia::BeginPlatformPaint