Bug 1298173 - Remove redundant parameter. r=dvander

The parameter is always true if the tap type is a eSingleTap and false in
all other cases, so it's redundant. As it was added as an optimization in bug
1020199 removing it should be safe.

MozReview-Commit-ID: IPB8BUagQl6

gfx/layers/apz/util/ContentProcessController.cpp

@@ -141,7 +141,7 @@ ContentProcessController::HandleTap(
 {
   if (mBrowser) {
     mBrowser->HandleTap(aType, aPoint - mBrowser->GetChromeDisplacement(), aModifiers, aGuid,
-        aInputBlockId, (aType == TapType::eSingleTap));
+        aInputBlockId);
   }
 }