[DevTools] Turn ConsoleModel into a singleton

third_party/WebKit/LayoutTests/http/tests/inspector/service-workers/user-agent-override.html

Index: third_party/WebKit/LayoutTests/http/tests/inspector/service-workers/user-agent-override.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector/service-workers/user-agent-override.html b/third_party/WebKit/LayoutTests/http/tests/inspector/service-workers/user-agent-override.html
index 355837e759c3a44aef052948be61b6fbd95324d9..61d0ab0826e07d8595ecb6ffc0f70c7bfab7f685 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector/service-workers/user-agent-override.html
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector/service-workers/user-agent-override.html
@@ -30,13 +30,13 @@ function test()
     function waitForConsoleMessage(regex)
     {
         return new Promise(function(resolve) {
-            SDK.multitargetConsoleModel.addEventListener(SDK.ConsoleModel.Events.MessageAdded, sniff);
+            SDK.consoleModel.addEventListener(SDK.ConsoleModel.Events.MessageAdded, sniff);
 
             function sniff(e)
             {
                 if (e.data && regex.test(e.data.messageText)) {
                     resolve(e.data);
-                    SDK.multitargetConsoleModel.removeEventListener(SDK.ConsoleModel.Events.MessageAdded, sniff);
+                    SDK.consoleModel.removeEventListener(SDK.ConsoleModel.Events.MessageAdded, sniff);
                 }
             }
         });