DevTools: Implement console message logging through an extension

Source/devtools/front_end/main/Main.js

Index: Source/devtools/front_end/main/Main.js
diff --git a/Source/devtools/front_end/main/Main.js b/Source/devtools/front_end/main/Main.js
index 11f3e64dc3694ccafeef047e2e8bdb0f805e05be..49c7588214c519dbb9a2160ba1dda5a26ab717c0 100644
--- a/Source/devtools/front_end/main/Main.js
+++ b/Source/devtools/front_end/main/Main.js
@@ -370,6 +370,7 @@ WebInspector.Main.prototype = {
         WebInspector.actionRegistry = new WebInspector.ActionRegistry();
         WebInspector.shortcutRegistry = new WebInspector.ShortcutRegistry(WebInspector.actionRegistry);
         this._registerForwardedShortcuts();
+        this._registerMessageSinkListener();
 
         WebInspector.inspectorView = new WebInspector.InspectorView();
 
@@ -431,6 +432,21 @@ WebInspector.Main.prototype = {
         InspectorFrontendHost.setWhitelistedShortcuts(JSON.stringify(actionKeys));
     },
 
+    _registerMessageSinkListener: function()
+    {
+        WebInspector.messageSink.addEventListener(WebInspector.MessageSink.Events.MessageAdded, messageAdded);
+
+        /**
+         * @param {!WebInspector.Event} event
+         */
+        function messageAdded(event)
+        {
+            var message = /** @type {!WebInspector.MessageSink.Message} */ (event.data);
+            if (message.show)
+                WebInspector.actionRegistry.execute("console.show");
+        }
+    },
+
     _documentClick: function(event)
     {
         var anchor = event.target.enclosingNodeOrSelfWithNodeName("a");