Remove local test timeouts in SearchHistoryTest.

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 # running overnight and removing outdated bugs/suppressions.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 6295 matching lines @@
    fun:_ZN8chromeos23SessionManagerOperation*Ensure*KeyERKN4base8CallbackIFvvEEE
    fun:_ZN8chromeos23SessionManagerOperation12StartLoadingEv
    fun:_ZN8chromeos21LoadSettingsOperation3RunEv
    fun:_ZN8chromeos23SessionManagerOperation5StartEPNS_20SessionManagerClientE13scoped_refptrINS_12OwnerKeyUtilEES3_INS_*KeyEE
    fun:_ZN8chromeos21DeviceSettingsService18StartNextOperationEv
    fun:_ZN8chromeos21DeviceSettingsService7EnqueueEPNS_23SessionManagerOperationE
    fun:_ZN8chromeos21DeviceSettingsService11EnqueueLoadEb
    fun:_ZN8chromeos21DeviceSettingsService4LoadEv
 }
 {
-   bug_385198
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
-   fun:_ZN4base10TaskRunner16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_
-   fun:_ZN8app_list19DictionaryDataStore5FlushERKN4base8CallbackIFvvEEE
-   fun:_ZN8app_list16HistoryDataStore5FlushERKN4base8CallbackIFvvEEE
-   fun:_ZN8app_list4test12_GLOBAL__N_116StoreFlushWaiter4WaitEi
-   fun:_ZN8app_list4test17SearchHistoryTest5FlushEv
-   fun:_ZN8app_list4test17SearchHistoryTest8TearDownEv
-}
-{
    bug_385381
    Memcheck:Unaddressable
    fun:_ZN7WebCore23FrameLoaderStateMachine9advanceToENS0_5StateE
    fun:_ZN7WebCore11FrameLoader4initEv
    fun:_ZN7WebCore10LocalFrame4initEv
    fun:_ZN5blink17WebLocalFrameImpl22initializeAsChildFrameEPN7WebCore9FrameHostEPNS1_10FrameOwnerERKN3WTF12AtomicStringES9_
    fun:_ZN5blink17WebLocalFrameImpl16createChildFrameERKN7WebCore16FrameLoadRequestEPNS1_21HTMLFrameOwnerElementE
 }
 {
    bug_385386a
@@ skipping 71 matching lines @@
    fun:_Znw*
    fun:_ZN7content16WebURLLoaderImplC1Ev
    fun:_ZN7content17BlinkPlatformImpl15createURLLoaderEv
    fun:_ZN7WebCore10PingLoaderC1EPNS_10LocalFrameERNS_15ResourceRequestERKNS_18FetchInitiatorInfoENS_17StoredCredentialsE
    fun:_ZN7WebCore10PingLoader5startEPNS_10LocalFrameERNS_15ResourceRequestERKNS_18FetchInitiatorInfoENS_17StoredCredentialsE
    fun:_ZN7WebCore10PingLoader9loadImageEPNS_10LocalFrameERKNS_4KURLE
    fun:_ZN7WebCore15ResourceFetcher10fetchImageERNS_12FetchRequestE
    fun:_ZN7WebCore11ImageLoader19doUpdateFromElementEb
    fun:_ZN7WebCore11ImageLoader4Task3runEv
 }