tracing: Make ConvertableToTraceFormat move-only scoped_ptr

base/trace_event/heap_profiler_heap_dump_writer.h

Index: base/trace_event/heap_profiler_heap_dump_writer.h
diff --git a/base/trace_event/heap_profiler_heap_dump_writer.h b/base/trace_event/heap_profiler_heap_dump_writer.h
index 41f5488e35896ca31545e3bd0f4749a32a79a540..e6cf93b4ade771f6c3b3a27f595ffc6d9da16ec6 100644
--- a/base/trace_event/heap_profiler_heap_dump_writer.h
+++ b/base/trace_event/heap_profiler_heap_dump_writer.h
@@ -12,7 +12,7 @@
 #include "base/base_export.h"
 #include "base/containers/hash_tables.h"
 #include "base/macros.h"
-#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/trace_event/heap_profiler_allocation_context.h"
 
 namespace base {
@@ -26,7 +26,7 @@ class TypeNameDeduplicator;
 // a traced value with an "entries" array that can be dumped in the trace log,
 // following the format described in https://goo.gl/KY7zVE. The number of
 // entries is kept reasonable because long tails are not included.
-BASE_EXPORT scoped_refptr<TracedValue> ExportHeapDump(
+BASE_EXPORT scoped_ptr<TracedValue> ExportHeapDump(
     const hash_map<AllocationContext, size_t>& bytes_by_context,
     StackFrameDeduplicator* stack_frame_deduplicator,
     TypeNameDeduplicator* type_name_deduplicator);
@@ -54,7 +54,7 @@ struct BASE_EXPORT Entry {
 BASE_EXPORT bool operator<(Entry lhs, Entry rhs);
 
 // Serializes entries to an "entries" array in a traced value.
-BASE_EXPORT scoped_refptr<TracedValue> Serialize(const std::set<Entry>& dump);
+BASE_EXPORT scoped_ptr<TracedValue> Serialize(const std::set<Entry>& dump);
 
 // Helper class to dump a snapshot of an |AllocationRegister| or other heap
 // bookkeeping structure into a |TracedValue|. This class is intended to be