Suppress invalid accesses reported after GrEffectRef::~GrEffectRef

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 # running overnight and removing outdated bugs/suppressions.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 7056 matching lines @@
 }
 {
    bug_233541
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN22DiskCacheTestWithCache13CreateBackendEjPN4base6ThreadE
    fun:_ZN22DiskCacheTestWithCache13InitDiskCacheEv
    fun:_ZN22DiskCacheTestWithCache9InitCacheEv
    fun:*DiskCacheBackendTest_SimpleDoom*
 }
+{
+   bug_233541_a
+   Memcheck:Unaddressable
+   ...
+   fun:_ZN11GrEffectRefD0Ev
+   fun:_ZNK8SkRefCnt16internal_disposeEv
+   fun:_ZNK8SkRefCnt5unrefEv
+}
+{
+   bug_233541_b
+   Memcheck:Unaddressable
+   ...
+   fun:_ZN14DeferredDevice5flushEv
+   fun:_ZN8SkCanvas5flushEv
+   fun:_ZN7WebCore19Canvas2DLayerBridge14prepareTextureERN6WebKit17WebTextureUpdaterE
+   fun:_ZN6webkit27WebExternalTextureLayerImpl14PrepareTextureEPN2cc19ResourceUpdateQueueE
+   fun:_ZN2cc12TextureLayer6UpdateEPNS_19ResourceUpdateQueueEPKNS_20OcclusionTrackerBaseINS_5LayerENS_13RenderSurfaceEEEPNS_14RenderingStatsE
+   fun:_ZN2cc13LayerTreeHost18PaintLayerContentsERKSt6vectorI13scoped_refptrINS_5LayerEESaIS4_EEPNS_19ResourceUpdateQueueE
+   fun:_ZN2cc13LayerTreeHost12UpdateLayersEPNS_5LayerEPNS_19ResourceUpdateQueueE
+}
+