Fix memory leaks in extensions::SocketPermission

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 # running overnight and removing outdated bugs/suppressions.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 5759 matching lines @@
    ...
    fun:_ZNK7SkPaint14descriptorProcEPK8SkMatrixPFvPK12SkDescriptorPvES6_b
 }
 {
    bug_140628
    Memcheck:Leak
    ...
    fun:_ZN15ExtensionAction16RunIconAnimationEi
    fun:_ZN15ExtensionAction13SetAppearanceEiNS_10AppearanceE
 }
-{
-   bug_143401_a
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZNK10extensions16SocketPermission*
-   fun:_ZN10extensions16APIPermissionSet*
-   ...
-   fun:_ZN10extensions*Permission*Test*
-}
-{
-   bug_143401_b
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN9__gnu_cxx13new_allocatorISt13_Rb_tree_nodeIN10extensions20SocketPermissionDataEEE8allocateEmPKv
-   fun:_ZNSt8_Rb_treeIN10extensions20SocketPermissionDataES1_St9_IdentityIS1_ESt4lessIS1_ESaIS1_EE11_M_get_nodeEv
-   fun:_ZNSt8_Rb_treeIN10extensions20SocketPermissionDataES1_St9_IdentityIS1_ESt4lessIS1_ESaIS1_EE14_M_create_nodeERKS1_
-   fun:_ZNSt8_Rb_treeIN10extensions20SocketPermissionDataES1_St9_IdentityIS1_ESt4lessIS1_ESaIS1_EE10_M_insert_EPKSt18_Rb_tree_node_baseSA_RKS1_
-   ...
-   fun:_ZNK10extensions16SocketPermission*
-   fun:_ZN10extensions16APIPermissionSet*
-   ...
-   fun:_ZN10extensions*Permission*Test*
-}
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations
 
 {
    bug_todo_getdelim
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    ...
    fun:call_init
    fun:_dl_init
 }
 {
    bug_todo_getdelim2
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }