Revert "Pull chromium at 2c3ffb2355a27c32f45e508ef861416b820c823b"

base/trace_event/process_memory_dump.cc

 // Copyright 2015 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/process_memory_dump.h"
 
-#include "base/trace_event/process_memory_totals.h"
-#include "base/trace_event/trace_event_argument.h"
+#include "base/json/json_writer.h"
+#include "base/values.h"
 
 namespace base {
 namespace trace_event {
 
-ProcessMemoryDump::ProcessMemoryDump() : has_process_totals_(false) {
+ProcessMemoryDump::ProcessMemoryDump() {
 }
 
 ProcessMemoryDump::~ProcessMemoryDump() {
 }
 
-void ProcessMemoryDump::AsValueInto(TracedValue* value) const {
-  // Build up the [dumper name] -> [value] dictionary.
-  if (has_process_totals_) {
-    value->BeginDictionary("process_totals");
-    process_totals_.AsValueInto(value);
-    value->EndDictionary();
-  }
+void ProcessMemoryDump::AppendAsTraceFormat(std::string* out) const {
+  // Build up the [dumper name] -> [serialized snapshot] JSON dictionary.
+  DictionaryValue dict;
+  std::string json_dict;
+  // TODO(primiano): this will append here the actual dumps from the dumpers.
+  base::JSONWriter::Write(&dict, &json_dict);
+  *out += json_dict;
 }
 
 }  // namespace trace_event
 }  // namespace base