Widen suppression for bug 50936, suppress leaks in chrome/browser/host_conten...

tools/valgrind/memcheck/suppressions.txt

 # There are three 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 # running overnight and removing outdated bugs/suppressions.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 3730 matching lines @@
    fun:_ZN29ChromeURLRequestContextGetter18CreateOffTheRecordEP7Profile
    fun:_ZN23OffTheRecordProfileImpl*Profile
    fun:_ZN7Profile25CreateOffTheRecordProfileEv
    fun:_ZN11ProfileImpl22GetOffTheRecordProfileEv
    fun:_ZN7Browser18NewIncognitoWindowEv
    fun:_ZN7Browser29ExecuteCommandWithDispositionEi21WindowOpenDisposition
    fun:_ZN7Browser14ExecuteCommandEi
    ...
    fun:_ZN3IPC16MessageWithReplyI6Tuple2IiiE6Tuple1IRbEE18DispatchDelayReplyI18AutomationProviderMS8_FviiPNS_7MessageEEEEbPKS9_PT_T0_
    fun:_ZN18AutomationProvider17OnMessageReceivedERKN3IPC7MessageE
-   fun:_ZN3IPC12ChannelProxy7Context17OnDispatchMessageERKNS_7MessageE
-   fun:_ZN3IPC11SyncChannel20ReceivedSyncMsgQueue16DispatchMessagesEv
 }
 {
    bug_50968
    Memcheck:Leak
    ...
    fun:_ZN14WebDataService29InitializeDatabaseIfNecessaryEv
    fun:_Z16DispatchToMethodI14WebDataServiceMS0_FvvEEvPT_T0_RK6Tuple0
 }
 {
    bug_51055
@@ skipping 386 matching lines @@
    ...
    fun:_ZN17URLRequestHttpJobD0Ev
 }
 {
    bug_52826
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN14TestingProfile20CreateRequestContextEv
    fun:_ZN20GoogleURLTrackerTest20CreateRequestContextEv
 }
+{
+   bug_52828
+   Memcheck:Leak
+   fun:_Znw*
+   ...
+   fun:_ZN4base10JSONReader10BuildValueEb
+   fun:_ZN4base10JSONReader11JsonToValueERKSsbb
+   fun:_ZN4base10JSONReader18ReadAndReturnErrorERKSsbPiPSs
+   fun:_ZN4base10JSONReader4ReadERKSsb
+   fun:_ZN81_GLOBAL__N_chrome_browser_host_content_settings_map_unittest.cc*
+}