Fix memory leak in OneClickSigninHelperTest.

tools/heapcheck/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 # running overnight and removing outdated bugs/suppressions.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 1412 matching lines @@
    fun:TestingProfile::CreateWebDataService
 }
 {
    bug_129392
    Heapcheck:Leak
    fun:::ChromeTestSuiteInitializer::SetUpHostResolver
    fun:::ChromeTestSuiteInitializer::OnTestStart
    fun:testing::internal::TestEventRepeater::OnTestStart
 }
 {
-   bug_130246
-   Heapcheck:Leak
-   fun:SiteInstanceImpl::GetProcess
-   fun:content::RenderViewHostImpl::RenderViewHostImpl
-   fun:RenderViewHostFactory::Create
-   fun:RenderViewHostManager::Init
-   fun:WebContentsImpl::WebContentsImpl
-   fun:content::TestWebContents::TestWebContents
-   fun:content::WebContentsTester::CreateTestWebContents
-   fun:::OneClickSigninHelperTest::CreateMockWebContents
-   fun:OneClickSigninHelperTest_*
-}
-{
   bug_130640_a
   Heapcheck:Leak
   ...
   fun:GtkThemeService::GetFolderIcon
 }
 {
   bug_130640_b
   Heapcheck:Leak
   ...
   fun:GtkThemeService::GetDefaultFavicon
 }