Try to fix the memory leak reports in g_restrictions.

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 # running overnight and removing outdated bugs/suppressions.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 5066 matching lines @@
    fun:_ZN13JsonPrefStore18CommitPendingWriteEv
    fun:_ZN13JsonPrefStoreD0Ev
    fun:_ZNK4base10RefCountedI9PrefStoreE7ReleaseEv
    fun:_ZN13scoped_refptrI19PersistentPrefStoreEaSEPS0_
    fun:_ZN11PrefServiceD0Ev
    fun:_ZN10scoped_ptrI11PrefServiceED1Ev
    fun:_ZN14TestingProfileD2Ev
    fun:_ZN23ExtensionTestingProfileD0Ev
 }
 {
-   bug_106571
-   Memcheck:Leak
-   fun:_Znw*
-   ...
-   fun:_ZN10extensions12_GLOBAL__N_112RestrictionsC1ERKS1_
-   ...
-   fun:_ZN9Extension13InitFromValueEPN10extensions8ManifestEiPSbItN4base20string16_char_traitsESaItEE
-   fun:_ZN9Extension6CreateERK8FilePathNS_8LocationERKN4base15DictionaryValueEiPSs
-   fun:_ZNK26ExtensionMsg_Loaded_Params18ConvertToExtensionEv
-   fun:_ZN19ExtensionDispatcher8OnLoadedERKSt6vectorI26ExtensionMsg_Loaded_ParamsSaIS1_EE
-}
-{
    bug_107503
    Memcheck:Uninitialized
    ...
    fun:_ZN7WebCore16CSSStyleSelector15styleForElementEPNS_7ElementEPNS_11RenderStyleEbbPNS_12RenderRegionE
    fun:_ZN7WebCore7Element16styleForRendererEv
    fun:_ZN7WebCore7Element11recalcStyleENS_4Node11StyleChangeE
    ...
    fun:_ZN7WebCore7Element11recalcStyleENS_4Node11StyleChangeE
    fun:_ZN7WebCore8Document11recalcStyleENS_4Node11StyleChangeE
    fun:_ZN7WebCore8Document19updateStyleIfNeededEv
@@ skipping 481 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
 }