Update suppression for issue 49404 and 50630.

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 # running overnight and removing outdated bugs/suppressions.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 3489 matching lines @@
    bug_49279
    Memcheck:Leak
    fun:_Znw*
    ...
    fun:_ZN30ChromeURLRequestContextFactoryC2EP7Profile
    fun:_ZN12_GLOBAL__N_118FactoryForOriginalC2EP7ProfileRK8FilePathS5_i
    fun:_ZN29ChromeURLRequestContextGetter14CreateOriginalEP7ProfileRK8FilePathS4_i
    fun:_ZN11ProfileImpl17GetRequestContextEv
 }
 {
-   bug_49404a
+   # Valgrind does not like using a std::string after resize() w/o initialiing.
+   bug_49404
    Memcheck:Value4
    fun:modp_b64_encode
    fun:_ZN4base12Base64EncodeERKSsPSs
-   fun:_ZN3net14HttpAuthGSSAPI17GenerateAuthToken*
-   fun:_ZN3net24HttpAuthHandlerNegotiate19DoGenerateAuthTokenEv
-   fun:_ZN3net24HttpAuthHandlerNegotiate6DoLoopEi
-   fun:_ZN3net24HttpAuthHandlerNegotiate12OnIOCompleteEi
-   fun:_Z16DispatchToMethodIN3net24HttpAuthHandlerNegotiateEMS1_FviEiEvPT_T0_RK6Tuple1IT1_E
-   fun:_ZN12CallbackImplIN3net24HttpAuthHandlerNegotiateEMS1_FviE6Tuple1IiEE13RunWithParamsERKS5_
-   fun:_ZN14CallbackRunnerI6Tuple1IiEE3RunIiEEvRKT_
-   fun:_ZN3net25SingleRequestHostResolver19OnResolveCompletionEi
-   fun:_Z16DispatchToMethodIN3net25SingleRequestHostResolverEMS1_FviEiEvPT_T0_RK6Tuple1IT1_E
-   fun:_ZN12CallbackImplIN3net25SingleRequestHostResolverEMS1_FviE6Tuple1IiEE13RunWithParamsERKS5_
-   fun:_ZN14CallbackRunnerI6Tuple1IiEE3RunIiEEvRKT_
-   fun:_ZN3net16HostResolverImpl7Request10OnCompleteEiRKNS_11AddressListE
-   fun:_ZN3net16HostResolverImpl13OnJobCompleteEPNS0_3JobEiiRKNS_11AddressListE
-   fun:_ZN3net16HostResolverImpl3Job16OnLookupCompleteEv
-}
-{
-   bug_49404b
-   Memcheck:Value4
-   fun:modp_b64_encode
-   fun:_ZN4base12Base64EncodeERKSsPSs
-   fun:_ZN3net14HttpAuthGSSAPI17GenerateAuthTokenEPKSbIwSt11char_traitsIwESaIwEES6_RS5_PSs
-   ...
-   fun:_ZN3net24HttpAuthHandlerNegotiate6DoLoopEi
-   fun:_ZN3net24HttpAuthHandlerNegotiate21GenerateAuthTokenImpl*
-   fun:_ZN3net15HttpAuthHandler17GenerateAuthToken*
-   fun:_ZN3net46HttpAuthHandlerNegotiateTest_DisableCname_Test8TestBodyEv
 }
 {
    bug_50056
    Memcheck:Leak
    fun:_Znw*
    fun:_Z11NewCallbackI22ContentSettingsHandlerPK5ValueEPN9Callback1IT0_E4TypeEPT_MS9_FvS5_E
    fun:_ZN22ContentSettingsHandler16RegisterMessagesEv
    fun:_ZN17DOMMessageHandler6AttachEP5DOMUI
    fun:_ZN9OptionsUI23AddOptionsPageUIHandlerEP15DictionaryValueP20OptionsPageUIHandler
    fun:_ZN9OptionsUIC1EP11TabContents
@@ skipping 52 matching lines @@
    fun:_Z16DispatchToMethodIN3net16HostResolverImpl3JobEMS2_FvvEEvPT_T0_RK6Tuple0
    fun:_ZN14RunnableMethodIN3net16HostResolverImpl3JobEMS2_FvvE6Tuple0E3RunEv
 }
 {
    bug_50583
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN64_GLOBAL__N_net_base_cookie_monster_unittest.cc_00000000_C9F6D94420AddKeyedCookieToListERKSsS1_RKN4base4TimeEPSt6vectorISt4pairISsPN3net13CookieMonster15CanonicalCookieEESaISC_EE
    fun:_ZN3net55CookieMonsterTest_DontImportDuplicateCreationTimes_Test8TestBodyEv
 }
-{
-   bug_50630
-   Memcheck:Value4
-   fun:modp_b64_encode
-   fun:_ZN4base12Base64EncodeERKSsPSs
-   fun:_Z24ConvertSkBitmapToDataURLRK8SkBitmap
-   fun:_ZN22InternetOptionsHandler10GetNetworkERKSsRK8SkBitmapS1_bbib
-   ...
-   fun:_ZN22InternetOptionsHandler18GetLocalizedValuesEP15DictionaryValue
-   fun:_ZN9OptionsUI23AddOptionsPageUIHandlerEP15DictionaryValueP20OptionsPageUIHandler
-   fun:_ZN9OptionsUIC1EP11TabContents
-}