Remove temporary code in FullscreenController and WebWidgetClient.

public/web/WebWidgetClient.h

Index: public/web/WebWidgetClient.h
diff --git a/public/web/WebWidgetClient.h b/public/web/WebWidgetClient.h
index c71f005b6f6107c606aa6203cff7e1dc202dea6f..e01cd0f3dbc736f73d3042ee443151b45b0b27f8 100644
--- a/public/web/WebWidgetClient.h
+++ b/public/web/WebWidgetClient.h
@@ -111,14 +111,6 @@ public:
     // closed.
     virtual void runModal() { }
 
-    // Called to enter/exit fullscreen mode. If enterFullScreen returns true,
-    // then WebWidget::{will,Did}EnterFullScreen should bound resizing the
-    // WebWidget into fullscreen mode. Similarly, when exitFullScreen is
-    // called, WebWidget::{will,Did}ExitFullScreen should bound resizing the
-    // WebWidget out of fullscreen mode.
-    virtual bool enterFullScreen() { return false; }
-    virtual void exitFullScreen() { }
-
     // Called to get/set the position of the widget in screen coordinates.
     virtual WebRect windowRect() { return WebRect(); }
     virtual void setWindowRect(const WebRect&) { }