Fix memory leak in WebsiteSettingsTest.ShowInfoBar.

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 # running overnight and removing outdated bugs/suppressions.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 5823 matching lines @@
    fun:glLinkProgram
    fun:_ZN3gpu5gles214ProgramManager11ProgramInfo4LinkEPNS0_13ShaderManagerEPNS0_16ShaderTranslatorES6_PNS0_11FeatureInfoE
    fun:_ZN3gpu5gles216GLES2DecoderImpl13DoLinkProgramEj
    fun:_ZN3gpu5gles216GLES2DecoderImpl17HandleLinkProgramEjRKNS0_11LinkProgramE
    fun:_ZN3gpu5gles216GLES2DecoderImpl9DoCommandEjjPKv
    fun:_ZN3gpu13CommandParser14ProcessCommandEv
    fun:_ZN3gpu12GpuScheduler10PutChangedEv
    fun:_ZN6webkit3gpu18GLInProcessContext12PumpCommandsEv
 }
 {
-   bug_140041
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN15WebsiteSettings11OnUIClosingEv
-   fun:_ZN36WebsiteSettingsTest_ShowInfoBar_Test8TestBodyEv
-}
-{
    bug_140196
    Memcheck:Uninitialized
    fun:_ZNK12SkDescriptor6equalsERKS_
    fun:_ZN12SkGlyphCache10VisitCacheEPK12SkDescriptorPFbPKS_PvES5_
    ...
    fun:_ZNK7SkPaint14descriptorProcEPK8SkMatrixPFvPK12SkDescriptorPvES6_b
 }
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations
@@ skipping 16 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }