Work around a Purify bug by making an object used by NetTestSuite stack alloc...

net/base/run_all_unittests.cc

Index: net/base/run_all_unittests.cc
===================================================================
--- net/base/run_all_unittests.cc	(revision 9313)
+++ net/base/run_all_unittests.cc	(working copy)
@@ -34,19 +34,19 @@
 
 class NetTestSuite : public TestSuite {
  public:
-  NetTestSuite(int argc, char** argv)
-      : TestSuite(argc, argv),
-        host_mapper_(new net::RuleBasedHostMapper()),
-        scoped_host_mapper_(host_mapper_.get()) {
+  NetTestSuite(int argc, char** argv) : TestSuite(argc, argv) {
+  }
+
+  virtual void Initialize() {
+    TestSuite::Initialize();
+
+    host_mapper_ = new net::RuleBasedHostMapper();
+    scoped_host_mapper_.Init(host_mapper_.get());
     // In case any attempts are made to resolve host names, force them all to
     // be mapped to localhost.  This prevents DNS queries from being sent in
     // the process of running these unit tests.
     host_mapper_->AddRule("*", "127.0.0.1");
-  }
 
-  virtual void Initialize() {
-    TestSuite::Initialize();
-
     message_loop_.reset(new MessageLoopForIO());
   }