Convert devtools interfaces over to using WebString....

chrome/renderer/devtools_agent_filter.cc

 // Copyright (c) 2009 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 "chrome/renderer/devtools_agent_filter.h"
 
 #include "base/message_loop.h"
 #include "chrome/common/devtools_messages.h"
 #include "chrome/renderer/devtools_agent.h"
 #include "chrome/renderer/plugin_channel_host.h"
 #include "chrome/renderer/render_view.h"
+#include "webkit/api/public/WebString.h"
 #include "webkit/glue/webdevtoolsagent.h"
 
+using WebKit::WebString;
+
 // static
 void DevToolsAgentFilter::DispatchMessageLoop() {
   MessageLoop* current = MessageLoop::current();
   bool old_state = current->NestableTasksAllowed();
   current->SetNestableTasksAllowed(true);
   current->RunAllPending();
   current->SetNestableTasksAllowed(old_state);
 }
 
 DevToolsAgentFilter::DevToolsAgentFilter()
@@ skipping 14 matching lines @@
       IPC_MESSAGE_HANDLER(DevToolsAgentMsg_DebuggerCommand, OnDebuggerCommand)
       IPC_MESSAGE_UNHANDLED(handled = false)
     IPC_END_MESSAGE_MAP()
     return handled;
   } else {
     return false;
   }
 }
 
 void DevToolsAgentFilter::OnDebuggerCommand(const std::string& command) {
-  WebDevToolsAgent::ExecuteDebuggerCommand(command, current_routing_id_);
+  WebDevToolsAgent::ExecuteDebuggerCommand(
+      WebString::fromUTF8(command), current_routing_id_);
 }