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 aec735ef3a91847d5fb64b59ce5f70a8346b92bd..4b6681c918f855082e2734add34c524d2460f692 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
@@ -191,8 +191,9 @@ 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;
@@ -1072,6 +1073,7 @@ 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();