Implementation of the Extension Activity Log UI behind a flag.

chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc

Index: chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
diff --git a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
index f41f6e0e4a011b8486a16696a39f5f7f0f256adc..8165aa7da32012430acda343aeaa3bd3d36739b0 100644
--- a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
+++ b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
@@ -21,6 +21,7 @@
 #include "chrome/browser/ui/webui/devtools_ui.h"
 #include "chrome/browser/ui/webui/downloads_ui.h"
 #include "chrome/browser/ui/webui/edit_search_engine_dialog_ui_webui.h"
+#include "chrome/browser/ui/webui/extensions/extension_activity_ui.h"
 #include "chrome/browser/ui/webui/extensions/extensions_ui.h"
 #include "chrome/browser/ui/webui/feedback_ui.h"
 #include "chrome/browser/ui/webui/task_manager_ui.h"
@@ -343,6 +344,12 @@ WebUIFactoryFunction GetWebUIFactoryFunction(content::WebUI* web_ui,
     return &NewWebUI<AboutUI>;
   }
 
+  if (url.host() == chrome::kChromeUIExtensionActivityHost &&
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableExtensionActivityUI)) {
+    return &NewWebUI<ExtensionActivityUI>;
+  }
+
   DLOG(WARNING) << "Unknown WebUI:" << url;
   return NULL;
 }