Add a mode flag to the tracing framework.

content/browser/tracing/trace_message_filter.cc

 // 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.
 
 #include "content/browser/tracing/trace_message_filter.h"
 
 #include "components/tracing/tracing_messages.h"
 #include "content/browser/tracing/trace_controller_impl.h"
 
 namespace content {
@@ skipping 38 matching lines @@
                         OnTraceNotification)
     IPC_MESSAGE_HANDLER(TracingHostMsg_TraceBufferPercentFullReply,
                         OnTraceBufferPercentFullReply)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP_EX()
   return handled;
 }
 
 void TraceMessageFilter::SendBeginTracing(
     const std::vector<std::string>& included_categories,
-    const std::vector<std::string>& excluded_categories) {
+    const std::vector<std::string>& excluded_categories,
+    base::debug::TraceLog::TraceMode mode) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  Send(new TracingMsg_BeginTracing(included_categories,
-                                   excluded_categories,
-                                   base::TimeTicks::NowFromSystemTraceTime()));
+  Send(new TracingMsg_BeginTracing(
+      included_categories,
+      excluded_categories,
+      base::TimeTicks::NowFromSystemTraceTime(),
+      base::debug::TraceLog::StringFromTraceMode(mode)));
 }
 
 void TraceMessageFilter::SendEndTracing() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!is_awaiting_end_ack_);
   is_awaiting_end_ack_ = true;
   Send(new TracingMsg_EndTracing);
 }
 
 void TraceMessageFilter::SendGetTraceBufferPercentFull() {
@@ skipping 45 matching lines @@
   if (is_awaiting_buffer_percent_full_ack_) {
     is_awaiting_buffer_percent_full_ack_ = false;
     TraceControllerImpl::GetInstance()->OnTraceBufferPercentFullReply(
         percent_full);
   } else {
     NOTREACHED();
   }
 }
 
 }  // namespace content