Revert of Change memory dumps to not use periodic dumps by default.

content/browser/tracing/tracing_ui.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 "content/browser/tracing/tracing_ui.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <set>
@@ skipping 71 matching lines @@
   bool options_ok = true;
   std::string category_filter_string;
   options_ok &= options->GetString("categoryFilter", &category_filter_string);
 
   std::string record_mode;
   options_ok &= options->GetString("tracingRecordMode", &record_mode);
 
   *trace_config = base::trace_event::TraceConfig(category_filter_string,
                                                  record_mode);
 
-  // When enabling memory-infra via tracing, use periodic dumping to trigger a
-  // detailed dump every 5s.
-  if (trace_config->IsCategoryGroupEnabled(
-          base::trace_event::MemoryDumpManager::kTraceCategory)) {
-    base::trace_event::TraceConfig::MemoryDumpConfig::Trigger trigger = {
-        5000,  // min_time_between_dumps_ms
-        base::trace_event::MemoryDumpLevelOfDetail::DETAILED,
-        base::trace_event::MemoryDumpType::PERIODIC_INTERVAL};
-    base::trace_event::TraceConfig::MemoryDumpConfig memory_dump_config;
-    memory_dump_config.triggers.push_back(trigger);
-
-    // TODO(ssid): Make a newly constructed MemoryDumpConfig use the default
-    // dump modes.
-    memory_dump_config.allowed_dump_modes.insert(
-        base::trace_event::MemoryDumpLevelOfDetail::DETAILED);
-    trace_config->ResetMemoryDumpConfig(memory_dump_config);
-  }
-
   bool enable_systrace;
   options_ok &= options->GetBoolean("useSystemTracing", &enable_systrace);
   if (enable_systrace)
     trace_config->EnableSystrace();
 
   if (!options_ok) {
     LOG(ERROR) << "Malformed options";
     return false;
   }
   return true;
@@ skipping 205 matching lines @@
     web_ui()->CallJavascriptFunctionUnsafe("onUploadComplete",
                                            base::Value(feedback));
   } else {
     web_ui()->CallJavascriptFunctionUnsafe("onUploadError",
                                            base::Value(feedback));
   }
   trace_uploader_.reset();
 }
 
 }  // namespace content