Remove sendMessageToFrontendOnIOThread implementation from test_shell_devtools_agent.cc

webkit/tools/test_shell/test_shell_devtools_agent.cc

Index: webkit/tools/test_shell/test_shell_devtools_agent.cc
diff --git a/webkit/tools/test_shell/test_shell_devtools_agent.cc b/webkit/tools/test_shell/test_shell_devtools_agent.cc
index b692459d67d040cf79295d924c7ba91ee246cbf2..704827db372ca6f460bf308ccdde1ab976567966 100644
--- a/webkit/tools/test_shell/test_shell_devtools_agent.cc
+++ b/webkit/tools/test_shell/test_shell_devtools_agent.cc
@@ -162,9 +162,3 @@ bool TestShellDevToolsAgent::evaluateInWebInspector(
   agent->evaluateInWebInspector(call_id, WebString::fromUTF8(script));
   return true;
 }
-
-// static
-void WebKit::WebDevToolsAgentClient::sendMessageToFrontendOnIOThread(
-    WebKit::WebDevToolsMessageData const &) {
-  NOTIMPLEMENTED();
-}