Add some suppressions to make reliability_tests greener under Valgrind

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 # running overnight and removing outdated bugs/suppressions.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 1127 matching lines @@
    fun:_ZN2pp25CompletionCallbackFactoryI15TestingInstanceNS_22ThreadSafeThreadTraitsEE11Dispatcher0IMS1_FviEEclEPS1_i
    fun:_ZN2pp25CompletionCallbackFactoryI15TestingInstanceNS_22ThreadSafeThreadTraitsEE12CallbackDataINS3_11Dispatcher0IMS1_FviEEEE5ThunkEPvi
 }
 {
   intentional_see_bug_156466
   Memcheck:Leak
   fun:_Znw*
   fun:_ZN3ash5ShellC1EPNS_13ShellDelegateE
   fun:_ZN3ash5Shell14CreateInstanceEPNS_13ShellDelegateE
 }
+{
+   bug_163902
+   Memcheck:Param
+   socketcall.sendto(msg)
+   ...
+   fun:_ZN3net8internal19AddressTrackerLinux4InitEv
+   fun:_ZN3net26NetworkChangeNotifierLinux6Thread4InitEv
+}
+{
+   bug_163904
+   Memcheck:Param
+   exit_group(status)
+   fun:SyscallAsm
+   fun:_ZN11playground214SandboxSyscallEiz
+   fun:_ZN11playground23Die9ExitGroupEv
+   fun:_ZN11playground23Die10SandboxDieEPKcS2_i
+   fun:_ZN11playground27Sandbox13installFilterEb
+}
 
 #-----------------------------------------------------------------------
 # 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).
 
 {
    # Chromium flakily leaks tasks at shutdown, see
    # http://crbug.com/6532
    # http://codereview.chromium.org/20067
    # http://codereview.chromium.org/42083
@@ skipping 1977 matching lines @@
    fun:_ZN11ProfileImpl30InitRegisteredProtocolHandlersEv
    fun:_ZN11ProfileImpl11DoFinalInitEv
    fun:_ZN11ProfileImpl13OnPrefsLoadedEb
 }
 {
    bug_88640_b
    Memcheck:Leak
    ...
    fun:_ZN11ProfileImpl13OnPrefsLoadedEb
    ...
-   fun:_ZN11ProfileImplC*ERK8FilePathPN7Profile8DelegateE
+   fun:_ZN11ProfileImplC*ERK8FilePathPN7Profile8DelegateE*
 }
 {
    bug_88640_c
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN29ChromeURLRequestContextGetter14CreateOriginalEP7ProfilePK13ProfileIOData
    fun:_ZN17ProfileImplIOData6Handle4InitERK8FilePathS3_S3_iS3_iS3_S3_PN18chrome_browser_net9PredictorEP11PrefServiceP8IOThread
    fun:_ZN11ProfileImpl11DoFinalInitEv
    fun:_ZN11ProfileImpl13OnPrefsLoadedEb
 }
@@ skipping 3087 matching lines @@
    ...
    fun:_ZN2v88internalL19HandleApiCallHelperILb0EEEPNS0_11MaybeObjectENS0_12_GLOBAL__N_116BuiltinArgumentsILNS0_21BuiltinExtraArgumentsE1EEEPNS0_7IsolateE
 }
 {
    bug_163111
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4dbus8Response14FromMethodCallEPNS_10MethodCallE
    fun:_ZN8chromeos4ibus20IBusPanelServiceImpl*Properties*
 }
+{
+   bug_163922
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN10extensions16SettingsFrontendC1ERK13scoped_refptrINS_22SettingsStorageFactoryEEP7Profile
+   fun:_ZN10extensions16SettingsFrontend6CreateEP7Profile
+   fun:_ZN16ExtensionServiceC1EP7ProfilePK11CommandLineRK8FilePathPN10extensions14ExtensionPrefsEPNS8_9BlacklistEbb
+   fun:_ZN10extensions19ExtensionSystemImpl6Shared4InitEb
+   fun:_ZN10extensions19ExtensionSystemImpl21InitForRegularProfileEb
+   fun:_ZN14ProfileManager22DoFinalInitForServicesEP7Profileb
+   fun:_ZN14ProfileManager11DoFinalInitEP7Profileb
+   fun:_ZN14ProfileManager10AddProfileEP7Profile
+   fun:_ZN14ProfileManager10GetProfileERK8FilePath
+}
+{
+   bug_163924
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN24JSONAsynchronousUnpacker6CreateEP32JSONAsynchronousUnpackerDelegate
+   fun:_ZN18WebResourceService18OnURLFetchCompleteEPKN3net10URLFetcherE
+   fun:_ZN3net14URLFetcherCore29InformDelegateFetchIsCompleteEv
+   fun:_ZN3net14URLFetcherCore21OnCompletedURLRequestEN4base9TimeDeltaE
+}