Roll Clang 216630:217949 (try 2)

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 # running overnight and removing outdated bugs/suppressions.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 477 matching lines @@
 }
 {
    bug_399852_d
    Memcheck:Uninitialized
    fun:_ZN5blink14DateComponents10parseMonthERKN3WTF6StringEjRj
    ...
    fun:_ZNK5blink24BaseDateAndTimeInputType21parseToDateComponentsERKN3WTF6StringEPNS_14DateComponentsE
    fun:_ZNK5blink24BaseDateAndTimeInputType15typeMismatchForERKN3WTF6StringE
    fun:_ZNK5blink24BaseDateAndTimeInputType13sanitizeValueERKN3WTF6StringE
 }
+{
+   bug_418234
+   Memcheck:Uninitialized
+   fun:_ZN10extensions19ExtensionManagement7RefreshEv
+   fun:_ZN10extensions19ExtensionManagement22OnExtensionPrefChangedEv
+}
 
 #-----------------------------------------------------------------------
 # 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).
 
 {
    # webkit leak?  See http://crbug.com/9503
    bug_9503
    Memcheck:Leak
    ...
@@ skipping 2938 matching lines @@
    fun:_ZNK7storage24SandboxFileSystemBackend25CreateFileSystemOperationERKNS_13FileSystemURLEPNS_17FileSystemContextEPN4base4File5ErrorE
    fun:_ZN7storage17FileSystemContext25CreateFileSystemOperationERKNS_13FileSystemURLEPN4base4File5ErrorE
 }
 {
    bug_417526
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base19SequencedWorkerPoolC1EmRKSs
    fun:_ZN16sync_file_system13drive_backend14SyncEngineTest5SetUpEv
 }