Add more suppression rules for NSS leaks.

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 # running overnight and removing outdated bugs/suppressions.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 107 matching lines @@
    fun:net::CertDatabaseNSSTest::TearDown
 }
 {
    bug_51988_g
    Heapcheck:Leak
    fun:sqlite3MemMalloc
    ...
    fun:net::CertDatabaseNSSTest::SetUp
 }
 {
+   bug_51988_h
+   Heapcheck:Leak
+   fun:sqlite3MemMalloc
+   ...
+   fun:chromeos::OncNetworkParser::ParseServerOrCaCertificate
+   fun:chromeos::OncNetworkParser::ParseCertificate
+}
+{
+   bug_51988_i
+   Heapcheck:Leak
+   fun:sqlite3MemMalloc
+   fun:net::X509Certificate::GetDefaultNickname
+}
+{
+   bug_51988_j
+   Heapcheck:Leak
+   fun:sqlite3MemMalloc
+   fun:chromeos::*::ListCertsInSlot
+   ...
+   fun:chromeos::*::TearDown
+}
+{
    bug_66941_a
    Heapcheck:Leak
    fun:PR_NewLock
    fun:net::TestRootCerts::*
 }
 {
    bug_66941_b
    Heapcheck:Leak
    fun:nss_ZAlloc
    fun:net::TestRootCerts::*
@@ skipping 1658 matching lines @@
    fun:GoogleURLTrackerTest_InfobarShownAgainOnSearchAfterCommittedSearch_Test::TestBody
 }
 {
    bug_124766_b
    Heapcheck:Leak
    ...
    fun:GURL::GURL
    ...
    fun:GoogleURLTrackerTest_InfobarShownAgainOnSearchAfterCommittedSearch_Test::TestBody
 }