Fix memory leak in OneClickSigninHelperTest.

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 # running overnight and removing outdated bugs/suppressions.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 5773 matching lines @@
    fun:_ZN36RefcountedProfileKeyedServiceFactory20GetServiceForProfileEP7Profileb
    fun:_ZN36RefcountedProfileKeyedServiceFactory23SetTestingFactoryAndUseEP7ProfilePF13scoped_refptrI29RefcountedProfileKeyedServiceES1_E
    fun:_ZN14TestingProfile20CreateWebDataServiceEv
 }
 {
    bug_127931
    Memcheck:Unaddressable
    fun:_ZN4base6Thread10ThreadMainEv
    fun:_ZN4base12_GLOBAL__N_110ThreadFuncEPv
 }
-{
-   bug_130246
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN16SiteInstanceImpl10GetProcessEv
-   fun:_ZN7content18RenderViewHostImplC1EPNS_12SiteInstanceEPNS_22RenderViewHostDelegateEPNS_24RenderWidgetHostDelegateEibPNS_23SessionStorageNamespaceE
-   fun:_ZN21RenderViewHostFactory6CreateEPN7content12SiteInstanceEPNS0_22RenderViewHostDelegateEPNS0_24RenderWidgetHostDelegateEibPNS0_23SessionStorageNamespaceE
-   fun:_ZN21RenderViewHostManager4InitEPN7content14BrowserContextEPNS0_12SiteInstanceEi
-   fun:_ZN15WebContentsImplC2EPN7content14BrowserContextEPNS0_12SiteInstanceEiPKS_PS_P27SessionStorageNamespaceImpl
-   fun:_ZN7content15TestWebContentsC1EPNS_14BrowserContextEPNS_12SiteInstanceE
-   fun:_ZN7content17WebContentsTester21CreateTestWebContentsEPNS_14BrowserContextEPNS_12SiteInstanceE
-   fun:_ZN12_GLOBAL__N_124OneClickSigninHelperTest21CreateMockWebContentsEb
-   fun:_ZN*OneClickSigninHelperTest_*
-}
 
 {
    bug_130311 
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN26SQLiteServerBoundCertStore7Backend4LoadEPSt6vectorIPN3net20ServerBoundCertStore15ServerBoundCertESaIS5_EE
    fun:_ZN26SQLiteServerBoundCertStore4LoadEPSt6vectorIPN3net20ServerBoundCertStore15ServerBoundCertESaIS4_EE
    fun:_ZN57SQLiteServerBoundCertStoreTest_TestClearOnExitPolicy_Test8TestBodyEv
 }
 
@@ skipping 42 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }