Suppress valgrind report.

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
diff --git a/tools/valgrind/memcheck/suppressions.txt b/tools/valgrind/memcheck/suppressions.txt
index 17d68f423eb0256dc2b195c20b3e48d753c3f831..1c6c1ba9fc509e4460afbb3db6e86e3cd32cac50 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -6236,3 +6236,25 @@
    fun:_ZN3url17AddStandardSchemeEPKc
    fun:_ZN36AutocompleteInputTest_InputType_Test8TestBodyEv
 }
+{
+   bug_390500a
+   Memcheck:Uninitialized
+   ...
+   fun:_ZN14message_center22MessagePopupCollection13UpdateWidgetsEv
+   fun:_ZN14message_center22MessagePopupCollection18DoUpdateIfPossibleEv
+}
+{
+   bug_390500b
+   Memcheck:Uninitialized
+   ...
+   fun:_ZN14message_center22MessagePopupCollection17RepositionWidgetsEv
+   fun:_ZN14message_center22MessagePopupCollection18DoUpdateIfPossibleEv
+}
+
+{
+   bug_390500c
+   Memcheck:Uninitialized
+   ...
+   fun:_ZN14message_center22MessagePopupCollection17RepositionWidgetsEv
+   fun:_ZN14message_center22MessagePopupCollection14SetDisplayInfoERKN3gfx4RectES4_
+}