Suppress uninitialized read that aren't suppressed due to the lack of symbols.

tools/valgrind/drmemory/suppressions_full.txt

Index: tools/valgrind/drmemory/suppressions_full.txt
diff --git a/tools/valgrind/drmemory/suppressions_full.txt b/tools/valgrind/drmemory/suppressions_full.txt
index f65b93b210d03f70c2351a143a217d407192b06d..24aa28b38314af3efcd87a354e4ed869913e5290 100644
--- a/tools/valgrind/drmemory/suppressions_full.txt
+++ b/tools/valgrind/drmemory/suppressions_full.txt
@@ -1095,6 +1095,57 @@ name=http://crbug.com/64887 (GMock printing uninit data)
 ...
 *!testing::*::PrintBytesInObjectTo*
 
+#  crbug.com
+UNINITIALIZED READ
+name=crbug.com/366905 A (the same issue as 64887, but no symbols)
+MSVCR120.dll!_output_s_l
+MSVCR120.dll!_vsnprintf_helper
+MSVCR120.dll!_vsnprintf_s_l
+MSVCR120.dll!_snprintf_s
+*!*
+*!*
+...
+*!*
+*!*
+KERNEL32.dll!BaseThreadInitThunk
+
+UNINITIALIZED READ
+name=crbug.com/366905 B (the same issue as 64887, but no symbols)
+MSVCR120.dll!sprintf_s
+MSVCR120.dll!_uncaught_exception
+MSVCR120.dll!vsnprintf_s_l
+MSVCR120.dll!snprintf_s
+*!*
+*!*
+...
+*!*
+*!*
+KERNEL32.dll!BaseThreadInitThunk
+
+UNINITIALIZED READ
+name=crbug.com/366905 C (the same issue as 64887, but no symbols)
+*!*
+...
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+*!*
+KERNEL32.dll!BaseThreadInitThunk
+
 ###############################################################
 # Proactively borrowed from memcheck/suppressions.txt.
 # We have not yet seen these, but we are expanding the sets of tests