Events ignoring ack disposition receive synthetic acks.

content/public/android/java/src/org/chromium/content/browser/ContentViewGestureHandler.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewGestureHandler.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewGestureHandler.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewGestureHandler.java
index 2b23fc97c7ebe7f52dd43cd849e929826285a4cb..3e79dbe1223d3374956a2816819d57c5bdef76f8 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewGestureHandler.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewGestureHandler.java
@@ -207,8 +207,9 @@ class ContentViewGestureHandler implements LongPressDelegate {
     // These have to be kept in sync with content/port/common/input_event_ack_state.h
     static final int INPUT_EVENT_ACK_STATE_UNKNOWN = 0;
     static final int INPUT_EVENT_ACK_STATE_CONSUMED = 1;
-    static final int INPUT_EVENT_ACK_STATE_NOT_CONSUMED = 2;
-    static final int INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS = 3;
+    static final int INPUT_EVENT_ACK_STATE_IGNORED = 2;
+    static final int INPUT_EVENT_ACK_STATE_NOT_CONSUMED = 3;
+    static final int INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS = 4;
 
     // Return values of sendPendingEventToNative();
     static final int EVENT_FORWARDED_TO_NATIVE = 0;
@@ -1121,6 +1122,7 @@ class ContentViewGestureHandler implements LongPressDelegate {
                     assert(false);
                     break;
                 case INPUT_EVENT_ACK_STATE_CONSUMED:
+                case INPUT_EVENT_ACK_STATE_IGNORED:
                     mJavaScriptIsConsumingGesture = true;
                     mZoomManager.passTouchEventThrough(ackedEvent);
                     trySendPendingEventsToNative();