Track parent-child relations during profiling

content/common/child_process_messages.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 // Common IPC messages used for child processes.
 // Multiply-included message file, hence no include guard.
 
 #include "base/shared_memory.h"
+#include "base/tracked_objects.h"
 #include "base/values.h"
 #include "content/common/content_export.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message_macros.h"
 
+IPC_ENUM_TRAITS(tracked_objects::ThreadData::Status)
+
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 
 #define IPC_MESSAGE_START ChildProcessMsgStart
 
 // Messages sent from the browser to the child process.
 
 // Sent in response to ChildProcessHostMsg_ShutdownRequest to tell the child
 // process that it's safe to shutdown.
 IPC_MESSAGE_CONTROL0(ChildProcessMsg_Shutdown)
@@ skipping 10 matching lines @@
                      std::vector<std::string> /* excluded_categories */)
 
 // Sent to all child processes to disable trace event recording.
 IPC_MESSAGE_CONTROL0(ChildProcessMsg_EndTracing)
 
 // 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 */)
+                     tracked_objects::ThreadData::Status /* profiler status */)
 
 // Send 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)
 
@@ skipping 36 matching lines @@
 
 // Release the cached font
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_ReleaseCachedFonts)
 #endif  // defined(OS_WIN)
 
 // Asks the browser to create a block of shared memory for the child process to
 // fill in and pass back to the browser.
 IPC_SYNC_MESSAGE_CONTROL1_1(ChildProcessHostMsg_SyncAllocateSharedMemory,
                             uint32 /* buffer size */,
                             base::SharedMemoryHandle)