Convert //base to use std::unique_ptr

base/trace_event/heap_profiler_heap_dump_writer.cc

Index: base/trace_event/heap_profiler_heap_dump_writer.cc
diff --git a/base/trace_event/heap_profiler_heap_dump_writer.cc b/base/trace_event/heap_profiler_heap_dump_writer.cc
index b94c31246b9d347d42c285d04878c586ed7f9163..fe99e48d00b44b5d20ac8fe4fbfb0846a1e9796a 100644
--- a/base/trace_event/heap_profiler_heap_dump_writer.cc
+++ b/base/trace_event/heap_profiler_heap_dump_writer.cc
@@ -248,9 +248,9 @@ const std::set<Entry>& HeapDumpWriter::Summarize(
   return entries_;
 }
 
-scoped_ptr<TracedValue> Serialize(const std::set<Entry>& entries) {
+std::unique_ptr<TracedValue> Serialize(const std::set<Entry>& entries) {
   std::string buffer;
-  scoped_ptr<TracedValue> traced_value(new TracedValue);
+  std::unique_ptr<TracedValue> traced_value(new TracedValue);
 
   traced_value->BeginArray("entries");
 
@@ -289,7 +289,7 @@ scoped_ptr<TracedValue> Serialize(const std::set<Entry>& entries) {
 
 }  // namespace internal
 
-scoped_ptr<TracedValue> ExportHeapDump(
+std::unique_ptr<TracedValue> ExportHeapDump(
     const hash_map<AllocationContext, size_t>& bytes_by_size,
     StackFrameDeduplicator* stack_frame_deduplicator,
     TypeNameDeduplicator* type_name_deduplicator) {