Suppress bugs 50583 and 50598 on Linux Heapcheck

BUG=50583,50598
TBR=bryner,rdsmith


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@54112 0039d316-1c4b-4281-b951-d872f2087c98

tools/heapcheck/suppressions.txt

@@ -956,3 +956,15 @@
    fun:Browser
    fun:BrowserWithTestWindowTest::SetUp
 }
+{
+   bug_50583
+   Heapcheck:Leak
+   ...
+   fun:net::CookieMonsterTest_DontImportDuplicateCreationTimes_Test::TestBody
+}
+{
+   bug_50598
+   Heapcheck:Leak
+   ...
+   fun:safe_browsing::PhishingDOMFeatureExtractorTest::SetUp
+}