Revert restartInput change off the M57 release branch.

third_party/WebKit/public/web/WebWidgetClient.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 88 matching lines @@
   // content view area, i.e. doesn't include any window decorations.
   virtual WebRect viewRect() { return WebRect(); }
 
   // Called when a tooltip should be shown at the current cursor position.
   virtual void setToolTipText(const WebString&, WebTextDirection hint) {}
 
   // Called to query information about the screen where this widget is
   // displayed.
   virtual WebScreenInfo screenInfo() { return WebScreenInfo(); }
 
+  // When this method gets called, WebWidgetClient implementation should
+  // reset the input method by cancelling any ongoing composition.
+  virtual void resetInputMethod() {}
+
   // Requests to lock the mouse cursor. If true is returned, the success
   // result will be asynchronously returned via a single call to
   // WebWidget::didAcquirePointerLock() or
   // WebWidget::didNotAcquirePointerLock().
   // If false, the request has been denied synchronously.
   virtual bool requestPointerLock() { return false; }
 
   // Cause the pointer lock to be released. This may be called at any time,
   // including when a lock is pending but not yet acquired.
   // WebWidget::didLosePointerLock() is called when unlock is complete.
@@ skipping 61 matching lines @@
                              const WebImage& dragImage,
                              const WebPoint& dragImageOffset) {}
 
  protected:
   ~WebWidgetClient() {}
 };
 
 }  // namespace blink
 
 #endif