shill: Replace VLOG with SLOG.

This CL replaces all uses of VLOG(level) with SLOG(scope, level) with
the same verbose level and an appropriate scope for each affected
logging statement.

BUG=chromium-os:29641
TEST=Build and run unit tests. Test scope logging with ff_debug.

Change-Id: Ifdcf1faa2a309bcbd9ee369a66179ce9c7f1ad19
Reviewed-on: https://gerrit.chromium.org/gerrit/20629
Commit-Ready: Ben Chan <benchan@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
diff --git a/service_dbus_adaptor.cc b/service_dbus_adaptor.cc
index 92f19aa..d26fdd6 100644
--- a/service_dbus_adaptor.cc
+++ b/service_dbus_adaptor.cc
@@ -7,9 +7,8 @@
 #include <map>
 #include <string>
 
-#include <base/logging.h>
-
 #include "shill/error.h"
+#include "shill/scope_logger.h"
 #include "shill/service.h"
 
 using std::map;
@@ -103,7 +102,7 @@
 
 void ServiceDBusAdaptor::ActivateCellularModem(const string &carrier,
                                                ::DBus::Error &error) {
-  VLOG(2) << __func__;
+  SLOG(DBus, 2) << __func__;
   Error e(Error::kOperationInitiated);
   DBus::Tag *tag = new DBus::Tag();
   service_->ActivateCellularModem(carrier, &e, GetMethodReplyCallback(tag));