Add devtools trace events for Timeline Program notification

Source/web/WebDevToolsAgentImpl.cpp

 /*
  * Copyright (C) 2010-2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 657 matching lines @@
         m_client->sendMessageToInspectorFrontend(m_frontendMessageQueue[i]->toJSONString());
     m_frontendMessageQueue.clear();
 }
 
 void WebDevToolsAgentImpl::willProcessTask()
 {
     if (!m_attached)
         return;
     if (InspectorController* ic = inspectorController())
         ic->willProcessTask();
+    TRACE_EVENT_BEGIN0(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "Program");
 }
 
 void WebDevToolsAgentImpl::didProcessTask()
 {
     if (!m_attached)
         return;
     if (InspectorController* ic = inspectorController())
         ic->didProcessTask();
+    TRACE_EVENT_END0(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "Program");
     flushPendingFrontendMessages();
 }
 
 void WebDevToolsAgent::interruptAndDispatch(MessageDescriptor* rawDescriptor)
 {
     // rawDescriptor can't be a PassOwnPtr because interruptAndDispatch is a WebKit API function.
     OwnPtr<MessageDescriptor> descriptor = adoptPtr(rawDescriptor);
     OwnPtr<DebuggerTask> task = adoptPtr(new DebuggerTask(descriptor.release()));
     PageScriptDebugServer::interruptAndRun(task.release());
 }
 
 bool WebDevToolsAgent::shouldInterruptForMessage(const WebString& message)
 {
     String commandName;
     if (!InspectorBackendDispatcher::getCommandName(message, &commandName))
         return false;
     return commandName == InspectorBackendDispatcher::commandName(InspectorBackendDispatcher::kDebugger_pauseCmd)
         || commandName == InspectorBackendDispatcher::commandName(InspectorBackendDispatcher::kDebugger_setBreakpointCmd)
         || commandName == InspectorBackendDispatcher::commandName(InspectorBackendDispatcher::kDebugger_setBreakpointByUrlCmd)
         || commandName == InspectorBackendDispatcher::commandName(InspectorBackendDispatcher::kDebugger_removeBreakpointCmd)
         || commandName == InspectorBackendDispatcher::commandName(InspectorBackendDispatcher::kDebugger_setBreakpointsActiveCmd);
 }
 
 void WebDevToolsAgent::processPendingMessages()
 {
     PageScriptDebugServer::shared().runPendingTasks();
 }
 
 } // namespace blink