Add a command line option to turn off retry attempts to resolve host

net/base/host_resolver.h

Index: net/base/host_resolver.h
===================================================================
--- net/base/host_resolver.h	(revision 85450)
+++ net/base/host_resolver.h	(working copy)
@@ -131,6 +131,11 @@
   // concurrency.
   static const size_t kDefaultParallelism = 0;
 
+  // This value can be passed into CreateSystemHostResolver as the
+  // |max_retry_attempts| parameter. This is the maximum number of times we
+  // will retry for host resolution.
+  static const size_t kDefaultRetryAttempts = 4;

[eroman, 2011/05/16 23:26:08]

(optional) I recommend using a similar model to above, where the generic
constant is just 0, and each implementation can choose its own concrete default
value.

(For other implementations of HostResolver retry attempts might not make sense,
or work differently)

[ramant (doing other things), 2011/05/17 18:46:25]

Done.

+
   // If any completion callbacks are pending when the resolver is destroyed,
   // the host resolutions are cancelled, and the completion callbacks will not
   // be called.
@@ -241,7 +246,11 @@
 // |max_concurrent_resolves| is how many resolve requests will be allowed to
 // run in parallel. Pass HostResolver::kDefaultParallelism to choose a
 // default value.
+// |max_retry_attempts| is the maximum number of times we will retry for host
+// resolution. Pass HostResolver::kDefaultRetryAttempts to choose a default
+// value.
 HostResolver* CreateSystemHostResolver(size_t max_concurrent_resolves,
+                                       size_t max_retry_attempts,
                                        NetLog* net_log);
 
 }  // namespace net