suppress memory leak from i#246092

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 # running overnight and removing outdated bugs/suppressions.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 1879 matching lines @@
    bug_245092b
    Heapcheck:Leak
    ...
    fun:disk_cache::Mem*
    ...
    fun:pnacl_cache::PNaClTranslationCacheWriteEntry::DispatchNext
    fun:pnacl_cache::PNaClTranslationCacheWriteEntry::OpenEntry
    fun:pnacl_cache::PNaClTranslationCacheWriteEntry::Cache
    fun:pnacl_cache::PNaClTranslationCache::StoreNexe
 }
+{
+   bug_245092c
+   Heapcheck:Leak
+   fun:std::basic_string::_Rep::_S_create
+   fun:std::basic_string::basic_string
+   fun:__gnu_cxx::__normal_iterator::base
+   fun:__gnu_cxx::operator!=
+}
+{
+   bug_245092d
+   Heapcheck:Leak
+   fun:std::basic_string::_Rep::_S_create
+   fun:std::basic_string::basic_string
+   fun:testing::TestResult::HasFatalFailure
+   fun:shadow_index
+}