Move the web dialogs code to src/ui/web_dialogs from src/chrome

chrome/test/base/test_web_dialog_observer.h

Index: chrome/test/base/test_web_dialog_observer.h
diff --git a/chrome/test/base/test_web_dialog_observer.h b/chrome/test/base/test_web_dialog_observer.h
index e88894a4fd9c5410072478efe3c85a43dfeaf0aa..3fef7fb66297a8af2924dfca6718972a9dd089f0 100644
--- a/chrome/test/base/test_web_dialog_observer.h
+++ b/chrome/test/base/test_web_dialog_observer.h
@@ -8,9 +8,9 @@
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "chrome/browser/ui/webui/web_dialog_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "ui/web_dialogs/web_dialog_observer.h"
 
 class JsInjectionReadyObserver;
 
@@ -23,7 +23,7 @@ class WebUI;
 // MessageLoop to detect WebDialog creation and quit when the constructed
 // WebUI instance is captured and ready.
 class TestWebDialogObserver : public content::NotificationObserver,
-                              public WebDialogObserver {
+                              public ui::WebDialogObserver {
  public:
   // Create and register a new TestWebDialogObserver. If
   // |js_injection_ready_observer| is non-NULL, notify it as soon as the RVH is