[tracing] Throttle rate of heavy dumps and support to request light/heavy dumps

content/browser/devtools/protocol/tracing_handler.cc

 // Copyright 2014 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/devtools/protocol/tracing_handler.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/format_macros.h"
@@ skipping 141 matching lines @@
   for (const std::string& category : category_set)
     categories.push_back(category);
   client_->SendGetCategoriesResponse(command_id,
       GetCategoriesResponse::Create()->set_categories(categories));
 }
 
 Response TracingHandler::RequestMemoryDump(DevToolsCommandId command_id) {
   if (!did_initiate_recording_)
     return Response::InternalError("Tracing is not started");
 
+  base::trace_event::MemoryDumpArgs dump_args = {
+      base::trace_event::MemoryDumpArgs::LEVEL_OF_DETAIL_HIGH};
   base::trace_event::MemoryDumpManager::GetInstance()->RequestGlobalDump(
-      base::trace_event::MemoryDumpType::EXPLICITLY_TRIGGERED,
+      base::trace_event::MemoryDumpType::EXPLICITLY_TRIGGERED, dump_args,
       base::Bind(&TracingHandler::OnMemoryDumpFinished,
                  weak_factory_.GetWeakPtr(), command_id));
   return Response::OK();
 }
 
 void TracingHandler::OnMemoryDumpFinished(DevToolsCommandId command_id,
                                           uint64 dump_guid,
                                           bool success) {
   client_->SendRequestMemoryDumpResponse(
       command_id,
@@ skipping 27 matching lines @@
   did_initiate_recording_ = false;
 }
 
 bool TracingHandler::IsRecording() const {
   return TracingController::GetInstance()->IsRecording();
 }
 
 }  // namespace tracing
 }  // namespace devtools
 }  // namespace content