Fix valgrind memory leak in session_manager_unittest....

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 # running overnight and removing outdated bugs/suppressions.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 3473 matching lines @@
    fun:_ZN3IPC16MessageWithTupleI6Tuple1IbEE8DispatchI31AutomationResourceMessageFilterMS5_FvbEEEbPKNS_7MessageEPT_T0_
    fun:_ZN31AutomationResourceMessageFilter17OnMessageReceivedERKN3IPC7MessageE
    fun:_ZN3IPC12ChannelProxy7Context10TryFiltersERKNS_7MessageE
    fun:_ZN3IPC11SyncChannel11SyncContext17OnMessageReceivedERKNS_7MessageE
    fun:_ZN3IPC7Channel11ChannelImpl23ProcessIncomingMessagesEv
    fun:_ZN3IPC7Channel11ChannelImpl28OnFileCanReadWithoutBlockingEi
    fun:_ZN4base19MessagePumpLibevent21FileDescriptorWatcher28OnFileCanReadWithoutBlockingEiPS0_
    fun:_ZN4base19MessagePumpLibevent22OnLibeventNotificationEisPv
 }
 {
-   bug_46678
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_Z11NewCallbackIN8remoting14SessionManager*
-   fun:_ZN8remoting14SessionManager8DoEncodeE13scoped_refptrINS_11CaptureDataEE
-   fun:_Z16DispatchToMethodIN8remoting14SessionManagerEMS1_Fv13scoped_refptrINS0_11CaptureDataEEES4_EvPT_T0_RK6Tuple1IT1_E
-   fun:_ZN14RunnableMethodIN8remoting14SessionManagerEMS1_Fv13scoped_refptrINS0_11CaptureDataEEE6Tuple1IS4_EE3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
-   ...
-   fun:_ZN8remoting38SessionManagerTest_OneRecordCycle_Test8TestBodyEv
-}
-{
    bug_47331_part_1
    Memcheck:Leak
    fun:malloc
    fun:malloc
    fun:sqlite3MemMalloc
    fun:mallocWithAlarm
    fun:sqlite3Malloc
    fun:sqlite3DbMallocRaw
    fun:sqlite3DbMallocZero
    fun:sqlite3StartTable
@@ skipping 698 matching lines @@
    fun:_ZN3net8internal26ClientSocketPoolBaseHelperD0Ev
    fun:_ZN4base10RefCountedIN3net8internal26ClientSocketPoolBaseHelperEE7ReleaseEv
    ...
    fun:_ZN13scoped_refptrIN3net8internal26ClientSocketPoolBaseHelperEED*Ev
    ...
    fun:_ZN3net20ClientSocketPoolBaseINS_15TCPSocketParamsEED*Ev
    fun:_ZN3net19TCPClientSocketPoolD0Ev
    fun:_ZN4base10RefCountedIN3net16ClientSocketPoolEE7ReleaseEv
 }
 {
-   bug_53277
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_Z11NewCallbackIN8remoting14SessionManagerEPNS0_21ChromotingHostMessageEiEPN9Callback2IT0_T1_E4TypeEPT_MSA_FvS5_S6_E
-   fun:_ZN8remoting14SessionManager8DoEncodeE13scoped_refptrINS_11CaptureDataEE
-   fun:_Z16DispatchToMethodIN8remoting14SessionManagerEMS1_Fv13scoped_refptrINS0_11CaptureDataEEES4_EvPT_T0_RK6Tuple1IT1_E
-   fun:_ZN14RunnableMethodIN8remoting14SessionManagerEMS1_Fv13scoped_refptrINS0_11CaptureDataEEE6Tuple1IS4_EE3RunEv
-   fun:_ZN11MessageLoop7RunTaskEP4Task
-   ...
-   fun:_ZN8remoting38SessionManagerTest_OneRecordCycle_Test8TestBodyEv
-}
-{
    bug_53349
    Memcheck:Addr4
    fun:PL_HashTableLookupConst
    fun:SECOID_FindOID_Util
    fun:SECOID_FindOIDTag_Util
    fun:SECOID_GetAlgorithmTag_Util
    fun:seckey_ExtractPublicKey
    fun:PKIX_PL_Cert_VerifySignature
    fun:pkix_SignatureChecker_Check
    fun:pkix_CheckChain
    fun:pkix_Build_ValidateEntireChain
    fun:pkix_BuildForwardDepthFirstSearch
    fun:pkix_Build_InitiateBuildChain
    fun:PKIX_BuildChain
    fun:CERT_PKIXVerifyCert
    ...
    fun:_ZNK3net15X509Certificate6VerifyERKSsiPNS_16CertVerifyResultE
    fun:_ZN3net12CertVerifier7Request8DoVerifyEv
    fun:_Z16DispatchToMethodIN3net12CertVerifier7RequestEMS2_FvvEEvPT_T0_RK6Tuple0
    fun:_ZN14RunnableMethodIN3net12CertVerifier7RequestEMS2_FvvE6Tuple0E3RunEv
 }