shill: Convert a couple of VLOGS to SLOGS.

In rebasing my previous CL, a couple of newly added VLOGs
went in, which have now been converted to SLOGs.

BUG=none
TEST=builds and runs

Change-Id: I91b2282d8bdbc2dfad2eb8a052a39b8737a7d0dd
Reviewed-on: https://gerrit.chromium.org/gerrit/20742
Reviewed-by: Ben Chan <benchan@chromium.org>
Commit-Ready: Eric Shienbrood <ers@chromium.org>
Tested-by: Eric Shienbrood <ers@chromium.org>
diff --git a/cellular_capability_universal.cc b/cellular_capability_universal.cc
index 8f9673b..6c3067d 100644
--- a/cellular_capability_universal.cc
+++ b/cellular_capability_universal.cc
@@ -190,7 +190,7 @@
 
 void CellularCapabilityUniversal::Start_EnableModemCompleted(
     const ResultCallback &callback, const Error &error) {
-  VLOG(2) << __func__ << ": " << error;
+  SLOG(Cellular, 2) << __func__ << ": " << error;
   if (error.IsFailure()) {
     callback.Run(error);
     return;
@@ -215,7 +215,7 @@
 
 void CellularCapabilityUniversal::Start_RegisterCompleted(
     const ResultCallback &callback, const Error &error) {
-  VLOG(2) << __func__ << ": " << error;
+  SLOG(Cellular, 2) << __func__ << ": " << error;
   if (error.IsSuccess()) {
     // Normally, running the callback is the last thing done in a method.
     // In this case, we do it first, because we want to make sure that
@@ -997,8 +997,8 @@
 
 void CellularCapabilityUniversal::OnModemStateChangedSignal(
     int32 old_state, int32 new_state, uint32 reason) {
-  VLOG(2) << __func__ << "(" << old_state << ", " << new_state << ", "
-          << reason << ")";
+  SLOG(Cellular, 2) << __func__ << "(" << old_state << ", " << new_state << ", "
+                    << reason << ")";
   cellular()->OnModemStateChanged(static_cast<Cellular::ModemState>(old_state),
                                   static_cast<Cellular::ModemState>(new_state),
                                   reason);