Merge 82973 - Cope gracefully with scripts querying stats before client has started.

remoting/client/plugin/chromoting_scriptable_object.cc

Index: remoting/client/plugin/chromoting_scriptable_object.cc
===================================================================
--- remoting/client/plugin/chromoting_scriptable_object.cc	(revision 83090)
+++ remoting/client/plugin/chromoting_scriptable_object.cc	(working copy)
@@ -141,16 +141,17 @@
 
   // If this is a statistics attribute then return the value from
   // ChromotingStats structure.
+  ChromotingStats* stats = instance_->GetStats();
   if (name.AsString() == kVideoBandwidthAttribute)
-    return instance_->GetStats()->video_bandwidth()->Rate();
+    return stats ? stats->video_bandwidth()->Rate() : Var();
   if (name.AsString() == kVideoCaptureLatencyAttribute)
-    return instance_->GetStats()->video_capture_ms()->Average();
+    return stats ? stats->video_capture_ms()->Average() : Var();
   if (name.AsString() == kVideoEncodeLatencyAttribute)
-    return instance_->GetStats()->video_encode_ms()->Average();
+    return stats ? stats->video_encode_ms()->Average() : Var();
   if (name.AsString() == kVideoDecodeLatencyAttribute)
-    return instance_->GetStats()->video_decode_ms()->Average();
+    return stats ? stats->video_decode_ms()->Average() : Var();
   if (name.AsString() == kVideoRenderLatencyAttribute)
-    return instance_->GetStats()->video_paint_ms()->Average();
+    return stats ? stats->video_paint_ms()->Average() : Var();
 
   // TODO(ajwong): This incorrectly return a null object if a function
   // property is requested.