Revert of Make classes and structures in web fast-allocated.

Source/web/PageWidgetDelegate.h

Index: Source/web/PageWidgetDelegate.h
diff --git a/Source/web/PageWidgetDelegate.h b/Source/web/PageWidgetDelegate.h
index 9242175b83a10584f5e593b59d9a42f67ca0b4eb..04f9beb012029116de6a1aae7cbddc7e03a27c7c 100644
--- a/Source/web/PageWidgetDelegate.h
+++ b/Source/web/PageWidgetDelegate.h
@@ -33,7 +33,6 @@
 
 #include "public/platform/WebCanvas.h"
 #include "public/web/WebWidget.h"
-#include "wtf/Allocator.h"
 #include "wtf/OwnPtr.h"
 
 namespace blink {
@@ -64,7 +63,6 @@
 
 // Common implementation of WebViewImpl and WebPagePopupImpl.
 class PageWidgetDelegate {
-    STATIC_ONLY(PageWidgetDelegate);
 public:
     // rootFrame arguments indicate a root localFrame from which to start performing the
     // specified operation. If rootFrame is 0, these methods will attempt to use the
@@ -74,6 +72,9 @@
     static void paint(Page&, WebCanvas*, const WebRect&, LocalFrame& root);
     static void paintIgnoringCompositing(Page&, WebCanvas*, const WebRect&, LocalFrame& root);
     static bool handleInputEvent(PageWidgetEventHandler&, const WebInputEvent&, LocalFrame* root);
+
+private:
+    PageWidgetDelegate() { }
 };
 
 }