UserGestureIndicator: remove many unnecessary calls to isMainThread

third_party/WebKit/public/web/WebUserGestureIndicator.h

 /*
  * Copyright (C) 2013 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 22 matching lines @@
 
 #include "../platform/WebCommon.h"
 
 namespace blink {
 
 class WebLocalFrame;
 class WebUserGestureToken;
 
 class WebUserGestureIndicator {
  public:
-  // Returns true if a user gesture is currently being processed.
+  // Returns true if a user gesture is currently being processed. Must be called
+  // on the main thread.
   BLINK_EXPORT static bool isProcessingUserGesture();
+  // Can be called from any thread. Note that this is slower than the non
+  // thread-safe version due to thread id lookups. Prefer the non thread-safe
+  // version for code that will only execute on the main thread.
+  BLINK_EXPORT static bool isProcessingUserGestureThreadSafe();
 
   // Returns true if a consumable gesture exists and has been successfully
   // consumed.
   BLINK_EXPORT static bool consumeUserGesture();
 
   // Returns true if a user gesture was processed on the provided frame since
   // the time the frame was loaded.
   BLINK_EXPORT static bool processedUserGestureSinceLoad(WebLocalFrame*);
 
   // Returns a token for the currently active user gesture. It can be used to
   // continue processing the user gesture later on using a
   // WebScopedUserGesture.
   BLINK_EXPORT static WebUserGestureToken currentUserGestureToken();
 };
 }
 
 #endif  // WebUserGestureIndicator_h