Don't delay tap down(show_press) gesture events on gesture_event_filter for Android

content/browser/renderer_host/gesture_event_filter.cc

Index: content/browser/renderer_host/gesture_event_filter.cc
diff --git a/content/browser/renderer_host/gesture_event_filter.cc b/content/browser/renderer_host/gesture_event_filter.cc
index f1e7bf9114832b9aac51607db97a02717b8f61a9..40daee5e2f48e3151186847cced5922360742c8b 100644
--- a/content/browser/renderer_host/gesture_event_filter.cc
+++ b/content/browser/renderer_host/gesture_event_filter.cc
@@ -18,7 +18,12 @@ namespace {
 
 // Default maximum time between the GestureRecognizer generating a
 // GestureTapDown and when it is forwarded to the renderer.
+#if !defined(OS_ANDROID)
 static const int kTapDownDeferralTimeMs = 150;
+#else
+// Android OS sends this gesture with a delay already.
+static const int kTapDownDeferralTimeMs = 0;
+#endif
 
 // Default debouncing interval duration: if a scroll is in progress, non-scroll
 // events during this interval are deferred to either its end or discarded on