widen suppresion for leak in UserManagerImpl::CreateUser

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 # running overnight and removing outdated bugs/suppressions.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 1778 matching lines @@
    fun:SkBitmap::allocPixels
    fun:gfx::::DecodeInfoCallback
    fun:wk_png_push_have_info
    fun:wk_png_push_read_chunk
    fun:wk_png_process_some_data
    fun:wk_png_process_data
    fun:gfx::PNGCodec::Decode
    fun:ui::ResourceBundle::LoadBitmap
    fun:ui::ResourceBundle::GetImageNamed
    fun:ui::ResourceBundle::GetBitmapNamed
-   ...
-   fun:chromeos::UserManagerImplWrapper::*
 }
 {
    bug_116996_c
    Heapcheck:Leak
    fun:std::*string::_Rep::_S_create
    fun:std::*string::copy
    fun:std::basic_string::basic_string
    fun:chromeos::*_Test::TestBody
 }
 {
@@ skipping 65 matching lines @@
 }
 {
    bug_118203
    Heapcheck:Leak
    ...
    fun:invalidation::NewPermanentCallback
    fun:invalidation::InvalidationClientImpl::ScheduleStartAfterReadingStateBlob
    fun:invalidation::InvalidationClientImpl::Start
    fun:sync_notifier::ChromeInvalidationClient::Start
 }