Add HostEventLogger to It2Me host plugin

remoting/host/plugin/host_script_object.cc

Index: remoting/host/plugin/host_script_object.cc
diff --git a/remoting/host/plugin/host_script_object.cc b/remoting/host/plugin/host_script_object.cc
index ac8f9af8ae1cbd658f96649972e78224e23d0bc7..6e8d067227561a6f1e0a7702c4cea44c3687ce0b 100644
--- a/remoting/host/plugin/host_script_object.cc
+++ b/remoting/host/plugin/host_script_object.cc
@@ -19,6 +19,7 @@
 #include "remoting/host/chromoting_host_context.h"
 #include "remoting/host/desktop_environment.h"
 #include "remoting/host/host_config.h"
+#include "remoting/host/host_event_logger.h"
 #include "remoting/host/host_key_pair.h"
 #include "remoting/host/host_secret.h"
 #include "remoting/host/it2me_host_user_interface.h"
@@ -36,6 +37,9 @@ namespace remoting {
 
 namespace {
 
+// This is used for tagging system event logs.
+const char kApplicationName[] = "chromoting";
+
 const char* kAttrNameAccessCode = "accessCode";
 const char* kAttrNameAccessCodeLifetime = "accessCodeLifetime";
 const char* kAttrNameClient = "client";
@@ -424,6 +428,7 @@ void HostNPScriptObject::OnShutdown() {
   register_request_.reset();
   log_to_server_.reset();
   signal_strategy_.reset();
+  host_event_logger_.reset();
   host_->RemoveStatusObserver(this);
   host_ = NULL;
 
@@ -579,6 +584,7 @@ void HostNPScriptObject::FinishConnectNetworkThread(
       &ChromotingHost::Shutdown, base::Unretained(host_.get()),
       base::Closure());
   it2me_host_user_interface_->Start(host_.get(), disconnect_callback);
+  host_event_logger_ = HostEventLogger::Create(host_, kApplicationName);

[alexeypa (please no reviews), 2012/07/19 17:05:00]

This is not going to work on Windows. Logging to the Event Log requires an event
source to be registered in the registry (per machine). For me2me host it is done
by the installer. it2me host on the other hand:

- Does not have admin privileges.
- Is installed per-user.

 
   {
     base::AutoLock auto_lock(ui_strings_lock_);