tracing: Make ConvertableToTraceFormat move-only scoped_ptr

base/trace_event/trace_event_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/trace_event/trace_event_impl.h"
 
 #include <fcntl.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 20 matching lines @@
     if (written <= 0)
       break;
     total_written += written;
   }
   if (total_written < size) {
     PLOG(WARNING) << "Failed to write buffer '" << std::string(buffer, size)
                   << "' to " << kATraceMarkerFile;
   }
 }
 
-void WriteEvent(
-    char phase,
-    const char* category_group,
-    const char* name,
-    unsigned long long id,
-    const char** arg_names,
-    const unsigned char* arg_types,
-    const TraceEvent::TraceValue* arg_values,
-    const scoped_refptr<ConvertableToTraceFormat>* convertable_values,
-    unsigned int flags) {
+void WriteEvent(char phase,
+                const char* category_group,
+                const char* name,
+                unsigned long long id,
+                const char** arg_names,
+                const unsigned char* arg_types,
+                const TraceEvent::TraceValue* arg_values,
+                const scoped_ptr<ConvertableToTraceFormat>* convertable_values,
+                unsigned int flags) {
   std::string out = StringPrintf("%c|%d|%s", phase, getpid(), name);
   if (flags & TRACE_EVENT_FLAG_HAS_ID)
     StringAppendF(&out, "-%" PRIx64, static_cast<uint64_t>(id));
   out += '|';
 
   for (int i = 0; i < kTraceMaxNumArgs && arg_names[i];
        ++i) {
     if (i)
       out += ';';
     out += arg_names[i];
@@ skipping 144 matching lines @@
   // trace buffer.
   double now_in_seconds = (TimeTicks::Now() - TimeTicks()).InSecondsF();
   std::string marker = StringPrintf(
       "trace_event_clock_sync: parent_ts=%f\n", now_in_seconds);
   WriteToATrace(atrace_fd, marker.c_str(), marker.size());
   close(atrace_fd);
 }
 
 }  // namespace trace_event
 }  // namespace base