Collect profiler stats from browser child processes.

content/common/child_process_messages.h

Index: content/common/child_process_messages.h
===================================================================
--- content/common/child_process_messages.h	(revision 110669)
+++ content/common/child_process_messages.h	(working copy)
@@ -5,6 +5,7 @@
 // Common IPC messages used for child processes.
 // Multiply-included message file, hence no include guard.
 
+#include "base/process.h"
 #include "base/shared_memory.h"
 #include "content/common/content_export.h"
 #include "googleurl/src/gurl.h"
@@ -41,6 +42,16 @@
 // Sent to all child processes to get trace buffer fullness.
 IPC_MESSAGE_CONTROL0(ChildProcessMsg_GetTraceBufferPercentFull)
 
+// Tell the child process to enable or disable the profiler status.
+IPC_MESSAGE_CONTROL1(ChildProcessMsg_SetProfilerStatus,
+                     bool /* profiler status */)
+
+// Sent to all the child processes to send back profiler data (ThreadData in
+// tracked_objects).
+IPC_MESSAGE_CONTROL2(ChildProcessMsg_GetChildProfilerData,
+                     int,          /* sequence number. */
+                     std::string   /* pickled Value of process type. */)
+
 // Sent to child processes to dump their handle table.
 IPC_MESSAGE_CONTROL0(ChildProcessMsg_DumpHandles)
 
@@ -67,6 +78,17 @@
 IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_TraceBufferPercentFullReply,
                      float /*trace buffer percent full*/)
 
+// Send back profiler data (ThreadData in tracked_objects) as a pickled string.
+IPC_MESSAGE_CONTROL2(ChildProcessHostMsg_ChildProfilerData,
+                     int, /* sequence number. */
+                     std::string /* pickled Value containing profiler data. */)

[jam, 2011/11/19 23:36:25]

just send the DictionaryValue directly here, and let the IPC code automatically
serialize it to a string

[ramant (doing other things), 2011/11/25 23:59:48]

Done.

+
+// Check if profiler is enabled in browser process or not. Browser process
+// responds by sending ChildProcessMsg_SetProfilerStatus message to the child
+// process (as specified by the child process id).
+IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_IsProfilerEnabled,
+                     base::ProcessId /* child process id (pid) */ )
+
 // Reply to ChildProcessMsg_DumpHandles when handle table dump is complete.
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_DumpHandlesDone)