Fix leak in pnacl translation cache and remove check suppressions

tools/heapcheck/suppressions.txt

Index: tools/heapcheck/suppressions.txt
diff --git a/tools/heapcheck/suppressions.txt b/tools/heapcheck/suppressions.txt
index b1ebe822ca5a7827ba5414455709a7488a2dbcd0..1e33563650b616e5f68e6ddcffd69b9745bb6def 100644
--- a/tools/heapcheck/suppressions.txt
+++ b/tools/heapcheck/suppressions.txt
@@ -1876,40 +1876,3 @@
    fun:ash::test::AshTestBase::UpdateDisplay
    fun:ash::internal::MirrorWindowControllerTest_MirrorCursor_Test::TestBody
 }
-{
-   bug_245092a
-   Heapcheck:Leak
-   ...
-   fun:disk_cache::MemBackendImpl::CreateBackend
-   fun:disk_cache::CreateCacheBackend
-   fun:pnacl_cache::PNaClTranslationCache::Init
-   fun:pnacl_cache::PNaClTranslationCache::InitWithMemBackend
-   fun:pnacl_cache::PNaClTranslationCache::InitCache
-}
-{
-   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
-}