Suppress some leaks that seem to be tcmalloc related.

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
diff --git a/tools/valgrind/memcheck/suppressions.txt b/tools/valgrind/memcheck/suppressions.txt
index 12914b58ac57fd1677269a812b06fcba6319af0a..d86da00ea664e33bc634f1eddf041d073fd0f55f 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -1836,3 +1836,36 @@
    fun:_ZN7WebCore11RenderLayer24updateLayerListsIfNeededEv
    fun:_ZN7WebCore11RenderLayer38updateCompositingAndLayerListsIfNeededEv
 }
+{
+   http://crbug.com/30436
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_Z10InitModulev
+   fun:pthread_once
+   fun:_ZN15MallocExtension8RegisterEPS_
+   fun:_ZN13TCMallocGuardC1Ev
+}
+{
+   http://crbug.com/30436
+   Memcheck:Param
+   write(buf)
+   obj:/lib/tls/i686/cmov/libc-2.7.so
+   fun:new_do_write
+   fun:_IO_do_write@@GLIBC_2.1
+   fun:_IO_file_overflow@@GLIBC_2.1
+   fun:_IO_switch_to_get_mode
+   fun:_IO_file_seekoff@@GLIBC_2.1
+   fun:_IO_seekoff_unlocked
+   fun:ftell
+   fun:ftell_file_func
+   fun:zipCloseFileInZipRaw
+}
+{
+   http://crbug.com/30436
+   Memcheck:Addr2
+   fun:_ZN8tcmalloc15CentralFreeList14FetchFromSpansEv
+   fun:_ZN8tcmalloc15CentralFreeList18FetchFromSpansSafeEv
+   fun:_ZN8tcmalloc15CentralFreeList11RemoveRangeEPPvS2_i
+   fun:_ZN8tcmalloc11ThreadCache21FetchFromCentralCacheEjj
+   fun:_ZN8tcmalloc11ThreadCache8AllocateEj
+}