Heapcheck: Undo accidental suppression removals from r223350.

tools/heapcheck/suppressions.txt

Index: tools/heapcheck/suppressions.txt
===================================================================
--- tools/heapcheck/suppressions.txt	(revision 223431)
+++ tools/heapcheck/suppressions.txt	(working copy)
@@ -889,3 +889,27 @@
    fun:SafeBrowsingDatabaseManagerTest::RunSBHashTest
    fun:SafeBrowsingDatabaseManagerTest_CheckCorrespondsListType_Test::TestBody
 }
+{
+   bug_2912
+   Heapcheck:Leak
+   fun:v8::internal::Malloced::New
+   fun:v8::internal::Zone::NewSegment
+   fun:v8::internal::Zone::NewExpand
+   fun:v8::internal::Zone::New
+   fun:v8::internal::ZoneAllocationPolicy::New
+   fun:v8::internal::List::NewData
+   fun:v8::internal::List::Resize
+}
+{
+   bug_291236_b
+   Heapcheck:Leak
+   fun:v8::internal::Malloced::New
+   fun:v8::internal::Zone::NewSegment
+   fun:v8::internal::Zone::NewExpand
+   fun:v8::internal::Zone::New
+   fun:v8::internal::ZoneObject::operator new
+   fun:v8::internal::HOptimizedGraphBuilder::VisitCompareOperation
+   fun:v8::internal::CompareOperation::Accept
+   fun:v8::internal::HOptimizedGraphBuilder::Visit
+   fun:v8::internal::HOptimizedGraphBuilder::VisitForControl
+}