Revert of [DevTools] Use InspectorFrontendHost.readyForTest for layout tests.

content/shell/renderer/layout_test/blink_test_runner.cc

Index: content/shell/renderer/layout_test/blink_test_runner.cc
diff --git a/content/shell/renderer/layout_test/blink_test_runner.cc b/content/shell/renderer/layout_test/blink_test_runner.cc
index 842caece8d9ad19fd690a2a42f5df4259264e689..76f1fccc9ad57539cf0bcc5e9d0a4d413d2bc92a 100644
--- a/content/shell/renderer/layout_test/blink_test_runner.cc
+++ b/content/shell/renderer/layout_test/blink_test_runner.cc
@@ -429,10 +429,12 @@
     agent->detach();
 }
 
-void BlinkTestRunner::EvaluateInWebInspector(int call_id,
+void BlinkTestRunner::EvaluateInWebInspector(long call_id,
                                              const std::string& script) {
-  Send(new ShellViewHostMsg_EvaluateInDevTools(
-      routing_id(), call_id, script));
+  WebDevToolsAgent* agent =
+      render_view()->GetMainRenderFrame()->GetWebFrame()->devToolsAgent();
+  if (agent)
+    agent->evaluateInWebInspector(call_id, WebString::fromUTF8(script));
 }
 
 std::string BlinkTestRunner::EvaluateInWebInspectorOverlay(