Add tracing support to NaCl

content/components/tracing/tracing_messages.h

Index: content/components/tracing/tracing_messages.h
diff --git a/content/components/tracing/tracing_messages.h b/content/components/tracing/tracing_messages.h
new file mode 100644
index 0000000000000000000000000000000000000000..792c476919e4eb8cba17fdbb49b4dba8ee262e11
--- /dev/null
+++ b/content/components/tracing/tracing_messages.h
@@ -0,0 +1,56 @@
+// 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.
+
+// Multiply-included message header, no traditional include guard.
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/sync_socket.h"
+#include "ipc/ipc_channel_handle.h"
+#include "ipc/ipc_message_macros.h"
+#include "ipc/ipc_message_utils.h"
+#include "ipc/ipc_platform_file.h"
+
+#define IPC_MESSAGE_START TracingMsgStart
+
+// Sent to all child processes to enable trace event recording.
+IPC_MESSAGE_CONTROL3(TracingMsg_BeginTracing,
+                     std::vector<std::string> /* included_categories */,
+                     std::vector<std::string> /* excluded_categories */,
+                     base::TimeTicks /* browser_time */)
+
+// Sent to all child processes to disable trace event recording.
+IPC_MESSAGE_CONTROL0(TracingMsg_EndTracing)
+
+// Sent to all child processes to get trace buffer fullness.
+IPC_MESSAGE_CONTROL0(TracingMsg_GetTraceBufferPercentFull)
+
+// Sent to all child processes to set watch event.
+IPC_MESSAGE_CONTROL2(TracingMsg_SetWatchEvent,
+                     std::string /* category_name */,
+                     std::string /* event_name */)
+
+// Sent to all child processes to clear watch event.
+IPC_MESSAGE_CONTROL0(TracingMsg_CancelWatchEvent)
+
+// Notify the browser that this child process supports tracing.
+IPC_MESSAGE_CONTROL0(TracingHostMsg_ChildSupportsTracing)
+
+// Reply from child processes acking ChildProcessMsg_TraceChangeStatus(false).
+IPC_MESSAGE_CONTROL1(TracingHostMsg_EndTracingAck,
+                     std::vector<std::string> /* known_categories */)
+
+// Sent if the trace buffer becomes full.
+IPC_MESSAGE_CONTROL1(TracingHostMsg_TraceNotification,
+                     int /* base::debug::TraceLog::Notification */)
+
+// Child processes send trace data back in JSON chunks.
+IPC_MESSAGE_CONTROL1(TracingHostMsg_TraceDataCollected,
+                     std::string /*json trace data*/)
+
+// Reply to TracingMsg_GetTraceBufferPercentFull.
+IPC_MESSAGE_CONTROL1(TracingHostMsg_TraceBufferPercentFullReply,
+                     float /*trace buffer percent full*/)
+