Fix classes that have too many virtuals for inline constructors.

content/public/browser/tracing_controller.h

Index: content/public/browser/tracing_controller.h
diff --git a/content/public/browser/tracing_controller.h b/content/public/browser/tracing_controller.h
index 6467e95212fbb3a2c976274cf920154c81918773..757ac9a8e29e08c01f7b4ca2dcb60bf076c01a8a 100644
--- a/content/public/browser/tracing_controller.h
+++ b/content/public/browser/tracing_controller.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "base/callback.h"
+#include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/trace_event/trace_event.h"
 #include "base/values.h"
@@ -53,10 +54,13 @@ class TracingController {
 
    protected:
     friend class base::RefCountedThreadSafe<TraceDataSink>;
+    TraceDataSink() = default;
     virtual ~TraceDataSink() {}
 
    private:
     base::DictionaryValue metadata_;
+
+    DISALLOW_COPY_AND_ASSIGN(TraceDataSink);
   };
 
   // An implementation of this interface is passed when constructing a