Add Tracing.requestMemoryDump method to DevTools API (tracing handler)

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"
 #include "base/strings/string_split.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
+#include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/trace_event_impl.h"
 
 namespace content {
 namespace devtools {
 namespace tracing {
 
 typedef DevToolsProtocolClient::Response Response;
 
 namespace {
 
@@ skipping 123 matching lines @@
     DevToolsCommandId command_id,
     const std::set<std::string>& category_set) {
   std::vector<std::string> categories;
   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) {
-  return Response::InternalError("Not implemented");
+  if (!did_initiate_recording_)
+    return Response::InternalError("Tracing is not started");
+
+  base::trace_event::MemoryDumpManager::GetInstance()->RequestGlobalDump(
+      base::trace_event::MemoryDumpType::EXPLICITLY_TRIGGERED,
+      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,
+      RequestMemoryDumpResponse::Create()
+          ->set_dump_guid(base::StringPrintf("0x%" PRIx64, dump_guid))
+          ->set_success(success));
 }
 
 void TracingHandler::SetupTimer(double usage_reporting_interval) {
   if (usage_reporting_interval == 0) return;
 
   if (usage_reporting_interval < kMinimumReportingInterval)
       usage_reporting_interval = kMinimumReportingInterval;
 
   base::TimeDelta interval = base::TimeDelta::FromMilliseconds(
       std::ceil(usage_reporting_interval));
@@ skipping 14 matching lines @@
   did_initiate_recording_ = false;
 }
 
 bool TracingHandler::IsRecording() const {
   return TracingController::GetInstance()->IsRecording();
 }
 
 }  // namespace tracing
 }  // namespace devtools
 }  // namespace content