Support tap_count in ui::GestureProvider.

content/browser/renderer_host/input/web_input_event_util.cc

Index: content/browser/renderer_host/input/web_input_event_util.cc
diff --git a/content/browser/renderer_host/input/web_input_event_util.cc b/content/browser/renderer_host/input/web_input_event_util.cc
index 611ee4d1a43501f6ac1862f99a6283e26da3d2f7..1bba801e805540bca8061e63fd85b0f50dd2af5e 100644
--- a/content/browser/renderer_host/input/web_input_event_util.cc
+++ b/content/browser/renderer_host/input/web_input_event_util.cc
@@ -256,14 +256,14 @@ WebGestureEvent CreateWebGestureEventFromGestureEventData(
       break;
     case ui::ET_GESTURE_TAP:
       gesture.type = WebInputEvent::GestureTap;
-      DCHECK_EQ(1, data.details.tap_count());
+      DCHECK_GT(data.details.tap_count(), 0);
       gesture.data.tap.tapCount = data.details.tap_count();
       gesture.data.tap.width = data.details.bounding_box_f().width();
       gesture.data.tap.height = data.details.bounding_box_f().height();
       break;
     case ui::ET_GESTURE_TAP_UNCONFIRMED:
       gesture.type = WebInputEvent::GestureTapUnconfirmed;
-      DCHECK_EQ(1, data.details.tap_count());
+      DCHECK_GT(data.details.tap_count(), 0);
       gesture.data.tap.tapCount = data.details.tap_count();
       gesture.data.tap.width = data.details.bounding_box_f().width();
       gesture.data.tap.height = data.details.bounding_box_f().height();