Add basic perf tests for chromoting protocol.

remoting/protocol/connection_to_host.h

Index: remoting/protocol/connection_to_host.h
diff --git a/remoting/protocol/connection_to_host.h b/remoting/protocol/connection_to_host.h
index e766741146b1c8da92da2b41f95ed23fa30a31d2..33c528c918330c055e8cc27883def7abde87ec4b 100644
--- a/remoting/protocol/connection_to_host.h
+++ b/remoting/protocol/connection_to_host.h
@@ -20,6 +20,7 @@
 #include "remoting/protocol/message_reader.h"
 #include "remoting/protocol/monitored_video_stub.h"
 #include "remoting/protocol/session.h"
+#include "remoting/protocol/session_config.h"
 #include "remoting/protocol/session_manager.h"
 #include "remoting/signaling/signal_strategy.h"
 
@@ -83,6 +84,10 @@ class ConnectionToHost : public SignalStrategy::Listener,
   ConnectionToHost();
   virtual ~ConnectionToHost();
 
+  // Allows to set a custom protocol configuration (e.g. for tests). Cannot be
+  // called after Connect().
+  void set_candidate_config(scoped_ptr<CandidateSessionConfig> config);

[rmsousa, 2014/07/16 23:06:00]

nit, feel free to ignore:
this name (and the corresponding class name) is a bit confusing.

Before I saw the actual code, I assumed candidate_config to be something
configuring candidates (like transport candidates), not a configuration
candidate (i.e. tentative configuration).

Since there is already a precedent for set_protocol_config (on the host side), I
suggest following that pattern instead, but I'm fine if you prefer to keep the
current name to match the underlying class.

[Sergey Ulanov, 2014/07/17 01:47:58]

Yeah I agree, that it might be confusing, but set_protocol_config() might be
equally confusing. There is a config() in this class that returns negotiated
protocol config. candidate_config is a term that's already used in other places,
e.g. in JingleSession there candidate_config() and config().

I renamed the new method in ChromotingClient to SetProtocolConfigForTests() - to
match what we have in the ChromotingHost. 

+
   // Set the stubs which will handle messages from the host.
   // The caller must ensure that stubs out-live the connection.
   // Unless otherwise specified, all stubs must be set before Connect()
@@ -156,6 +161,8 @@ class ConnectionToHost : public SignalStrategy::Listener,
 
   HostEventCallback* event_callback_;
 
+  scoped_ptr<CandidateSessionConfig> candidate_config_;
+
   // Stub for incoming messages.
   ClientStub* client_stub_;
   ClipboardStub* clipboard_stub_;