Update DevTools Tracing.Start to accept trace config as a parameter

third_party/WebKit/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 578 matching lines @@
         m_layerTreeAgent->didRemovePageOverlay(layer);
 }
 
 void WebDevToolsAgentImpl::layerTreeViewChanged(WebLayerTreeView* layerTreeView)
 {
     m_layerTreeId = layerTreeView ? layerTreeView->layerTreeId() : 0;
     if (m_tracingAgent)
         m_tracingAgent->setLayerTreeId(m_layerTreeId);
 }
 
+void WebDevToolsAgentImpl::enableTracingWithConfigStr(const String& devtoolsStyleConfig)
+{
+    m_client->enableTracingWithConfigStr(devtoolsStyleConfig);
+}
+
 void WebDevToolsAgentImpl::enableTracing(const String& categoryFilter)
 {
     m_client->enableTracing(categoryFilter);
 }
 
 void WebDevToolsAgentImpl::disableTracing()
 {
     m_client->disableTracing();
 }
 
@@ skipping 158 matching lines @@
     if (!protocol::Dispatcher::getCommandName(message, &commandName))
         return false;
     return commandName == "Debugger.pause"
         || commandName == "Debugger.setBreakpoint"
         || commandName == "Debugger.setBreakpointByUrl"
         || commandName == "Debugger.removeBreakpoint"
         || commandName == "Debugger.setBreakpointsActive";
 }
 
 } // namespace blink