Added command line switches and UI (controlled via a build option)

base/debug/profiler.h

Index: base/debug/profiler.h
diff --git a/base/debug/profiler.h b/base/debug/profiler.h
new file mode 100644
index 0000000000000000000000000000000000000000..da81d62385ff14bb67ef5ec2586fce5009af4c7f
--- /dev/null
+++ b/base/debug/profiler.h
@@ -0,0 +1,39 @@
+// Copyright (c) 2011 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.
+
+// This is a cross platform interface for helper functions related to
+// debuggers.  You should use this to test if you're running under a debugger,
+// and if you would like to yield (breakpoint) into the debugger.

[Evan Martin, 2011/02/01 02:45:59]

This comment is wrong, no?

[DaveMoore, 2011/02/01 19:21:55]

Done.

+
+#ifndef BASE_DEBUG_PROFILER_H
+#define BASE_DEBUG_PROFILER_H
+#pragma once
+
+#include <string>
+
+// The Profiler functions allow usage of the underlying sampling based
+// profiler. If the application has not been built with the necessary
+// flags (-DENABLE_PROFILING and not -DNO_TCMALLOC) then these functions
+// are noops.
+namespace base {
+namespace debug {
+
+// Start profiling with the supplied name.
+// {pid} will be replaced by the process' pid and {count} will be replaced
+// by the count of the profile run (starts at 1 with each process).
+void StartProfiling(const std::string name);

[jamesr, 2011/02/01 01:21:45]

nit: should this be by reference?

[DaveMoore, 2011/02/01 19:21:55]

Done.

+
+// Stop profiling and write out data.
+void StopProfiling();
+
+// Force data to be written to file.
+void FlushProfiling();
+
+// Returns true if process is being profiled.
+bool BeingProfiled();
+
+}  // namespace debug
+}  // namespace base
+
+#endif  // BASE_DEBUG_DEBUGGER_H