Fix RenderWidgetHostLatencyTracker handling of multi-finger touch.

content/browser/renderer_host/input/render_widget_host_latency_tracker.h

Index: content/browser/renderer_host/input/render_widget_host_latency_tracker.h
diff --git a/content/browser/renderer_host/input/render_widget_host_latency_tracker.h b/content/browser/renderer_host/input/render_widget_host_latency_tracker.h
index 7166ff20d69d413d075db77086d1bc8475ae5cc9..520e7ee9d100287283a7d754e89a884ecadaa938 100644
--- a/content/browser/renderer_host/input/render_widget_host_latency_tracker.h
+++ b/content/browser/renderer_host/input/render_widget_host_latency_tracker.h
@@ -78,9 +78,9 @@ class CONTENT_EXPORT RenderWidgetHostLatencyTracker {
   int64_t latency_component_id_;
   float device_scale_factor_;
   bool has_seen_first_gesture_scroll_update_;
-  // Whether the current stream of touch events has ever included more than one
-  // touch point.
-  bool multi_finger_gesture_;
+  // Whether the current stream of touch events includes more than one active
+  // touch point. This is set in OnInputEvent, and cleared in OnInputEventAck.
+  bool active_multi_finger_gesture_;
   // Whether the touch start for the current stream of touch events had its
   // default action prevented. Only valid for single finger gestures.
   bool touch_start_default_prevented_;