Revert 186849 "Bind Window focus ability to the ExecutionContext..."

public/web/WebScopedWindowFocusAllowedIndicator.h

Index: public/web/WebScopedWindowFocusAllowedIndicator.h
===================================================================
--- public/web/WebScopedWindowFocusAllowedIndicator.h	(revision 187183)
+++ public/web/WebScopedWindowFocusAllowedIndicator.h	(working copy)
@@ -35,27 +35,18 @@
 
 namespace blink {
 
-class ScopedWindowFocusAllowedIndicator;
-class WebDocument;
 class WindowFocusAllowedIndicator;
 
 class WebScopedWindowFocusAllowedIndicator {
 public:
-    explicit WebScopedWindowFocusAllowedIndicator(WebDocument* document) { initialize(document); }
-    // FIXME: this constructor is now deprecated. It will be removed as part of
-    // https://crbug.com/440740
     WebScopedWindowFocusAllowedIndicator() { initialize(); }
     ~WebScopedWindowFocusAllowedIndicator() { reset(); }
 
 private:
-    BLINK_EXPORT void initialize(WebDocument*);
     BLINK_EXPORT void initialize();
     BLINK_EXPORT void reset();
 
-    // FIXME: m_indicator is now deprecated. It will be removed as part of
-    // https://crbug.com/440740
     WebPrivateOwnPtr<WindowFocusAllowedIndicator> m_indicator;
-    WebPrivateOwnPtr<ScopedWindowFocusAllowedIndicator> m_private;
 };
 
 }