Refactor ZoomControlsDelegate out of ContentViewCore

content/public/android/java/src/org/chromium/content_public/browser/GestureStateListener.java

Index: content/public/android/java/src/org/chromium/content_public/browser/GestureStateListener.java
diff --git a/content/public/android/java/src/org/chromium/content_public/browser/GestureStateListener.java b/content/public/android/java/src/org/chromium/content_public/browser/GestureStateListener.java
index f3df2a8a8fb0d1d3e71c3861ffdfb47787410b18..2854b35084bf5a1ffb26731527daf0a5a202a88f 100644
--- a/content/public/android/java/src/org/chromium/content_public/browser/GestureStateListener.java
+++ b/content/public/android/java/src/org/chromium/content_public/browser/GestureStateListener.java
@@ -48,6 +48,11 @@ public class GestureStateListener {
     public void onScrollEnded(int scrollOffsetY, int scrollExtentY) {}
 
     /*
+     * Called when the min or max scale factor may have been changed.
+     */
+    public void onScaleLimitsChanged(float minPageScaleFactor, float maxPageScaleFactor) {}
+
+    /*
      * Called when the scroll offsets or extents may have changed.
      */
     public void onScrollOffsetOrExtentChanged(int scrollOffsetY, int scrollExtentY) {}