Suppress Valgrind reports on gfx::JPEGCodec...

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
===================================================================
--- tools/valgrind/memcheck/suppressions.txt	(revision 74266)
+++ tools/valgrind/memcheck/suppressions.txt	(working copy)
@@ -3715,3 +3715,28 @@
    fun:_ZN11MessageLoop11RunInternalEv
    fun:_ZN11MessageLoop10RunHandlerEv
 }
+{
+   bug_72399a
+   Memcheck:Addr8
+   ...
+   fun:jsimd_ycc_rgb_convert
+   fun:sep_upsample
+   fun:process_data_simple_main
+   fun:chromium_jpeg_read_scanlines
+   fun:_ZN3gfx9JPEGCodec6DecodeEPK*NS0_11ColorFormatEPSt6vectorIhSaIhEEPiS8_
+   fun:_ZN3gfx9JPEGCodec6DecodeEPK*
+   fun:*ExtractThumbnailERK15RefCountedBytes
+   fun:_ZN7history12TopSitesTest12GetThumbnailERK4GURL
+   fun:_ZN7history21TopSitesMigrationTest19MigrationAssertionsEv
+   fun:_ZN7history34TopSitesMigrationTest_Migrate_Test8TestBodyEv
+}
+{
+   bug_72399b
+   Memcheck:Addr8
+   fun:jsimd_ycc_rgb_convert_sse2
+}
+{
+   bug_72399c
+   Memcheck:Addr8
+   obj:*/unit_tests
+}