Chromium roll (https://codereview.chromium.org/976353002)

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 # running overnight and removing outdated bugs/suppressions.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 483 matching lines @@
    fun:_ZNK5blink24BaseDateAndTimeInputType21parseToDateComponentsERKN3WTF6StringEPNS_14DateComponentsE
    fun:_ZNK5blink24BaseDateAndTimeInputType15typeMismatchForERKN3WTF6StringE
    fun:_ZNK5blink24BaseDateAndTimeInputType13sanitizeValueERKN3WTF6StringE
 }
 {
    bug_418234
    Memcheck:Uninitialized
    fun:_ZN10extensions19ExtensionManagement7RefreshEv
    fun:_ZN10extensions19ExtensionManagement22OnExtensionPrefChangedEv
 }
+{
+   bug_464462
+   Memcheck:Uninitialized
+   fun:_ZN7content14ManifestParser16ParseIconDensityERKN4base15DictionaryValueE
+   fun:_ZN7content14ManifestParser10ParseIconsERKN4base15DictionaryValueE
+   fun:_ZN7content14ManifestParser5ParseEv
+   fun:_ZN7content18ManifestParserTest21ParseManifestWithURLsERKN4base16BasicStringPieceISsEERK4GURLS8_
+   fun:_ZN7content18ManifestParserTest13ParseManifestERKN4base16BasicStringPieceISsEE
+   fun:_ZN7content45ManifestParserTest_IconDensityParseRules_Test8TestBodyEv
+}
 
 #-----------------------------------------------------------------------
 # 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 3125 matching lines @@
    Memcheck:Leak
    fun:calloc
    fun:pthread_setspecific
    fun:_ZN4base8internal19ThreadLocalPlatform14SetValueInSlotEjPv
    fun:_ZN4base18ThreadLocalPointerIvE3SetEPv
    fun:_ZN4base18ThreadLocalBoolean3SetEb
    fun:_ZN4base12_GLOBAL__N_112WorkerThread10ThreadMainEv
    fun:_ZN4base12_GLOBAL__N_110ThreadFuncEPv
 }