Linux: Fix some GdkPixbuf leaks.

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 # running overnight and removing outdated bugs/suppressions.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 202 matching lines @@
   fun:FakeSyncShareTask::Run
   fun:MessageLoop::RunTask
 }
 
 {
   bug_38402
   Heapcheck:Leak
   fun:ProfileSyncFactoryImpl::CreateProfileSyncService
   fun:TestingProfile::CreateProfileSyncService
 }
-
-{
-  bug_38895
-  Heapcheck:Leak
-  fun:gfx::GdkPixbufFromSkBitmap
-  fun:KeywordEditorView::SetColumnValues
-}