Expand suppression 166709c to also cover bug 244800.

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 # running overnight and removing outdated bugs/suppressions.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 6133 matching lines @@
    fun:_ZN4base12_GLOBAL__N_110ThreadFuncEPv
 }
 {
    bug_166709c
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
    fun:_ZN4base10TaskRunner16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_
    fun:_ZN7content13BrowserThread28PostBlockingPoolTaskAndReplyERKN15tracked_objects8LocationERKN4base8CallbackIFvvEEESA_
    fun:_ZN10extensions11ImageLoader15LoadImagesAsyncEPKNS_9ExtensionERKSt6vectorINS0_19ImageRepresentationESaIS5_EERKN4base8CallbackIFvRKN3gfx5ImageEEEE
-   fun:_ZN10extensions11ImageLoader14LoadImageAsyncEPKNS_9ExtensionERK17ExtensionResourceRKN3gfx4SizeERKN4base8CallbackIFvRKNS7_5ImageEEEE
 }
 {
    bug_166818
    Memcheck:Leak
    fun:malloc
    fun:g_malloc
    ...
    fun:gdk_pixbuf_loader_load_module
    fun:gdk_pixbuf_loader_close
    fun:_ZN2ui12_GLOBAL__N_110LoadPixbufEPN4base22RefCountedStaticMemoryEb
@@ skipping 1132 matching lines @@
    fun:_ZN3ash8internal12_GLOBAL__N_119MirrorWindowCreatorD0Ev
    fun:_ZNK4base14DefaultDeleterIN3ash8internal12_GLOBAL__N_119MirrorWindowUpdaterEEclEPS4_
    fun:_ZN4base8internal15scoped_ptr_implIN3ash8internal12_GLOBAL__N_119MirrorWindowUpdaterENS_14DefaultDeleterIS5_EEED1Ev
    fun:_ZN10scoped_ptrIN3ash8internal12_GLOBAL__N_119MirrorWindowUpdaterEN4base14DefaultDeleterIS3_EEED1Ev
    fun:_ZN3ash8internal14DisplayManager14UpdateDisplaysERKSt6vectorINS0_11DisplayInfoESaIS3_EE
    fun:_ZN3ash8internal14DisplayManager23OnNativeDisplaysChangedERKSt6vectorINS0_11DisplayInfoESaIS3_EE
    fun:_ZN3ash4test21DisplayManagerTestApi13UpdateDisplayERKSs
    fun:_ZN3ash4test11AshTestBase13UpdateDisplayERKSs
    fun:_ZN3ash8internal44MirrorWindowControllerTest_MirrorCursor_Test8TestBodyEv
 }