Collect profiler stats from browser child processes.

content/common/child_thread.cc

Index: content/common/child_thread.cc
===================================================================
--- content/common/child_thread.cc	(revision 111617)
+++ content/common/child_thread.cc	(working copy)
@@ -4,9 +4,14 @@
 
 #include "content/common/child_thread.h"
 
+#include "base/bind.h"

[jam, 2011/11/28 15:17:34]

nit: not needed?

[ramant (doing other things), 2011/11/29 01:32:20]

Done.

+#include "base/command_line.h"
+#include "base/json/json_writer.h"

[jam, 2011/11/28 15:17:34]

nit: not needed

[ramant (doing other things), 2011/11/29 01:32:20]

Done.

 #include "base/message_loop.h"
+#include "base/process.h"
+#include "base/process_util.h"
 #include "base/string_util.h"
-#include "base/command_line.h"
+#include "base/tracked_objects.h"
 #include "content/common/child_process.h"
 #include "content/common/child_process_messages.h"
 #include "content/common/child_trace_message_filter.h"
@@ -183,6 +188,10 @@
     IPC_MESSAGE_HANDLER(ChildProcessMsg_SetIPCLoggingEnabled,
                         OnSetIPCLoggingEnabled)
 #endif
+    IPC_MESSAGE_HANDLER(ChildProcessMsg_SetProfilerStatus,
+                        OnSetProfilerStatus)
+    IPC_MESSAGE_HANDLER(ChildProcessMsg_GetChildProfilerData,
+                        OnGetChildProfilerData)
     IPC_MESSAGE_HANDLER(ChildProcessMsg_DumpHandles, OnDumpHandles)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
@@ -217,6 +226,20 @@
 }
 #endif  //  IPC_MESSAGE_LOG_ENABLED
 
+void ChildThread::OnSetProfilerStatus(bool enable) {
+  tracked_objects::ThreadData::InitializeAndSetTrackingStatus(enable);
+}
+
+void ChildThread::OnGetChildProfilerData(
+    int sequence_number,
+    const std::string& process_type) {
+  base::DictionaryValue* value = tracked_objects::ThreadData::ToValue();

[jam, 2011/11/28 15:17:34]

memory leak of value here 

[ramant (doing other things), 2011/11/29 01:32:20]

many many thanks for catching this (made the mistake when I converted to not use
json string).

Done.

+  value->SetString("process_type", process_type);
+  value->SetInteger("process_id", base::GetCurrentProcId());
+
+  Send(new ChildProcessHostMsg_ChildProfilerData(sequence_number, *value));
+}
+
 void ChildThread::OnDumpHandles() {
 #if defined(OS_WIN)
   scoped_refptr<content::HandleEnumerator> handle_enum(