mus: Use ui::ContextProviderCommandBuffer.

services/ui/public/cpp/gpu/command_buffer_metrics.cc

Index: services/ui/public/cpp/gpu/command_buffer_metrics.cc
diff --git a/services/ui/public/cpp/gpu/command_buffer_metrics.cc b/services/ui/public/cpp/gpu/command_buffer_metrics.cc
index 2d3505b914e8ccdaf4e1f75f95480cf805b49f5c..6f9e91d91aed42d675252b9dfa5a4612a1311f65 100644
--- a/services/ui/public/cpp/gpu/command_buffer_metrics.cc
+++ b/services/ui/public/cpp/gpu/command_buffer_metrics.cc
@@ -120,9 +120,15 @@ void RecordContextLost(ContextType type,
     case BLIMP_RENDER_COMPOSITOR_CONTEXT:
       UMA_HISTOGRAM_ENUMERATION("GPU.ContextLost.BlimpRenderCompositor", reason,
                                 CONTEXT_LOST_REASON_MAX_ENUM);
+      break;
     case BLIMP_RENDER_WORKER_CONTEXT:
       UMA_HISTOGRAM_ENUMERATION("GPU.ContextLost.BlimpRenderWorker", reason,
                                 CONTEXT_LOST_REASON_MAX_ENUM);
+      break;
+    case MUS_CLIENT_CONTEXT:
+      UMA_HISTOGRAM_ENUMERATION("GPU.ContextLost.MusClient", reason,
+                                CONTEXT_LOST_REASON_MAX_ENUM);
+      break;
     case CONTEXT_TYPE_UNKNOWN:
       UMA_HISTOGRAM_ENUMERATION("GPU.ContextLost.Unknown", reason,
                                 CONTEXT_LOST_REASON_MAX_ENUM);
@@ -160,6 +166,8 @@ std::string ContextTypeToString(ContextType type) {
       return "BlimpRenderCompositor";
     case BLIMP_RENDER_WORKER_CONTEXT:
       return "BlimpRenderWorker";
+    case MUS_CLIENT_CONTEXT:
+      return "MusClientContext";
     default:
       NOTREACHED();
       return "unknown";