Revert 51877, since SpdyNetworkTransactionTest.CorruptFrameSessionError start...

net/proxy/sync_host_resolver_bridge.cc

Index: net/proxy/sync_host_resolver_bridge.cc
===================================================================
--- net/proxy/sync_host_resolver_bridge.cc	(revision 51891)
+++ net/proxy/sync_host_resolver_bridge.cc	(working copy)
@@ -188,4 +188,19 @@
   core_->Shutdown();
 }
 
+// SingleThreadedProxyResolverUsingBridgedHostResolver -----------------------
+
+SingleThreadedProxyResolverUsingBridgedHostResolver::
+SingleThreadedProxyResolverUsingBridgedHostResolver(
+    ProxyResolver* proxy_resolver,
+    SyncHostResolverBridge* bridged_host_resolver)
+    : SingleThreadedProxyResolver(proxy_resolver),
+      bridged_host_resolver_(bridged_host_resolver) {
+}
+
+SingleThreadedProxyResolverUsingBridgedHostResolver::
+~SingleThreadedProxyResolverUsingBridgedHostResolver() {
+  bridged_host_resolver_->Shutdown();
+}
+
 }  // namespace net