Enable QUIC for proxies based on Finch config and command line switch.

chrome/browser/profiles/profile_impl_io_data.cc

Index: chrome/browser/profiles/profile_impl_io_data.cc
diff --git a/chrome/browser/profiles/profile_impl_io_data.cc b/chrome/browser/profiles/profile_impl_io_data.cc
index c6522a884b7aeb5e11d1b53ba43faa4e6627740a..e16453500034b296eafb9d4e4c5d3de9d9dfde9f 100644
--- a/chrome/browser/profiles/profile_impl_io_data.cc
+++ b/chrome/browser/profiles/profile_impl_io_data.cc
@@ -459,7 +459,10 @@ void ProfileImplIOData::InitializeInternal(
 
   main_context->set_net_log(io_thread->net_log());
 
-  data_reduction_proxy_io_data()->Init();
+  data_reduction_proxy_io_data()->Init(
+      IOThread::ShouldEnableQuicForProxies() &&
+      data_reduction_proxy::DataReductionProxyParams::
+      IsIncludedInQuicFieldTrial());

[mmenke, 2015/02/13 17:45:22]

The extra ShouldEnableQuicForProxies check seems weird, since the second check
being true forces the first to be true...

Suggest putting all this logic in IOThread, and setting another IOThreadGlobal
based on the result (allow_quic_for_data_reduction_proxy or somesuch).  That
would centralize all chrome-side logic on the topic, and we could deal with all
the cases there in one place.

And then here you have:

bool allow_quic_for_data_reduction_proxy = false;
io_thread_globals->allow_quic_for_data_reduction_proxy.CopyToIfSet(&allow_quic_for_data_reduction_proxy);
data_reduction_proxy_io_data()->Init(allow_quic_for_data_reduction_proxy);

[tbansal1, 2015/02/13 19:54:29]

Done.

 
   network_delegate_ = data_reduction_proxy_io_data()->CreateNetworkDelegate(
       chrome_network_delegate.Pass(), true).Pass();