Show gpu process stats in about:tcmalloc

content/browser/tcmalloc_internals_request_job.h

+// 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.
+
+#ifndef CONTENT_BROWSER_TCMALLOC_INTERNALS_REQUEST_JOB_H_
+#define CONTENT_BROWSER_TCMALLOC_INTERNALS_REQUEST_JOB_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/memory/singleton.h"
+#include "base/process.h"
+#include "build/build_config.h"  // USE_TCMALLOC
+#include "content/public/common/process_type.h"
+#include "net/url_request/url_request_simple_job.h"
+#include <map>

[jam, 2012/04/24 20:14:08]

nit: this needs to be at the top

+
+namespace content {
+
+// A map of header strings (e.g. "Browser", "Renderer PID 123")
+// to the tcmalloc output collected for each process.
+typedef std::map<std::string, std::string> AboutTcmallocOutputsType;

[jam, 2012/04/24 20:14:08]

nit: make this private if only this class is using it

+
+class AboutTcmallocOutputs {
+ public:
+  // Returns the singleton instance.
+  static AboutTcmallocOutputs* GetInstance();
+
+  // Records the output for a specified header string.
+  void SetOutput(const std::string& header, const std::string& output);
+
+  void DumpToHTMLTable(std::string* data);
+
+  // Callback for output returned from a child process.  Adds
+  // the output for a canonical process-specific header string that
+  // incorporates the pid.
+  void OnStatsForChildProcess(base::ProcessId pid,
+                              ProcessType process_type,
+                              const std::string& output);
+
+ private:
+  AboutTcmallocOutputs();
+  ~AboutTcmallocOutputs();
+
+  AboutTcmallocOutputsType outputs_;
+
+  friend struct DefaultSingletonTraits<AboutTcmallocOutputs>;
+
+  DISALLOW_COPY_AND_ASSIGN(AboutTcmallocOutputs);
+};
+
+class TcmallocInternalsRequestJob : public net::URLRequestSimpleJob {
+ public:
+  explicit TcmallocInternalsRequestJob(net::URLRequest* request);
+
+  virtual bool GetData(std::string* mime_type,
+                       std::string* charset,
+                       std::string* data) const OVERRIDE;
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(TcmallocInternalsRequestJob);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_TCMALLOC_INTERNALS_REQUEST_JOB_H_