Track memory consumption for decoder-internal resources

gpu/command_buffer/service/memory_tracking.h

Index: gpu/command_buffer/service/memory_tracking.h
diff --git a/gpu/command_buffer/service/memory_tracking.h b/gpu/command_buffer/service/memory_tracking.h
index 36653272ac5de315f41624186eef6bc5a4d8900c..db748e935cd812d4e33f8d6960208a2091193601 100644
--- a/gpu/command_buffer/service/memory_tracking.h
+++ b/gpu/command_buffer/service/memory_tracking.h
@@ -55,10 +55,16 @@ class MemoryTypeTracker {
     }
     has_updated_mem_represented_ = true;
     last_updated_mem_represented_ = mem_represented;
-    TRACE_COUNTER_ID1(trace_category_,
-                      trace_name_,
-                      memory_tracker_,
-                      last_updated_mem_represented_);
+    if (trace_category_ && trace_name_ && memory_tracker_) {
+      TRACE_COUNTER_ID1(trace_category_,
+                        trace_name_,
+                        memory_tracker_,
+                        last_updated_mem_represented_);
+    }
+  }
+
+  size_t GetMemRepresented() const {
+    return last_updated_mem_represented_;
   }
 
  private: