Add more VerifyObject calls.

Added verify object calls to SirtRef, IndirectReferenceTable,
ReferenceTable.

Removed un-needed verify object in ScopedObjectAccess / DecodeJObject
since object sources are handled.

Bug: 12934910
Change-Id: I55a46a8ea61fed2a77526eda27fd2cce97a9b125
diff --git a/runtime/indirect_reference_table.cc b/runtime/indirect_reference_table.cc
index c8855e3..ed3fb5f 100644
--- a/runtime/indirect_reference_table.cc
+++ b/runtime/indirect_reference_table.cc
@@ -355,4 +355,13 @@
   ReferenceTable::Dump(os, entries);
 }
 
+mirror::Object* IndirectReferenceTable::Get(IndirectRef iref) const {
+  if (!GetChecked(iref)) {
+    return kInvalidIndirectRefObject;
+  }
+  mirror::Object* obj = table_[ExtractIndex(iref)];;
+  VerifyObject(obj);
+  return obj;
+}
+
 }  // namespace art