Move WebUIFactory to chrome/browser.

content/browser/webui/web_ui.h

Index: content/browser/webui/web_ui.h
diff --git a/content/browser/webui/web_ui.h b/content/browser/webui/web_ui.h
index 98adcb183cc2804d6945fa1c7d7e8db0e5532b4a..4d0215f6bc300dbcf63dc3bda004f449c040542c 100644
--- a/content/browser/webui/web_ui.h
+++ b/content/browser/webui/web_ui.h
@@ -144,6 +144,14 @@ class WebUI {
 
   TabContents* tab_contents() const { return tab_contents_; }
 
+  // An opaque identifier used to identify a WebUI. This can only be compared to
+  // kNoWebUI or other WebUI types. See GetWebUIType.
+  typedef void* TypeID;
+
+  // A special WebUI type that signifies that a given page would not use the
+  // Web UI system.
+  static const TypeID kNoWebUI;
+
  protected:
   void AddMessageHandler(WebUIMessageHandler* handler);