Remove default frame pointers in IsProcessingUserGesture*().

Change-Id: If1678386ef82177792ed0b5e3ed091249eb901c6
Reviewed-on: https://chromium-review.googlesource.com/1251764Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Mustaq Ahmed <mustaq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595189}

third_party/blink/public/web/web_user_gesture_indicator.h

@@ -43,17 +43,12 @@ class WebUserGestureIndicator {
  public:
   // Returns true if a user gesture is currently being processed. Must be called
   // on the main thread.
-  //
-  // TODO(mustaq): remove the default value when all callers have been fixed.
-  BLINK_EXPORT static bool IsProcessingUserGesture(WebLocalFrame* = nullptr);
+  BLINK_EXPORT static bool IsProcessingUserGesture(WebLocalFrame*);
 
   // 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.
-  //
-  // TODO(mustaq): remove the default value when all callers have been fixed.
-  BLINK_EXPORT static bool IsProcessingUserGestureThreadSafe(
-      WebLocalFrame* = nullptr);
+  BLINK_EXPORT static bool IsProcessingUserGestureThreadSafe(WebLocalFrame*);
 
   // Returns true if a consumable gesture exists and has been successfully
   // consumed.