Hide location bar on WebKit programmatic scroll.

components/web_contents_delegate_android/android/java/src/org/chromium/components/web_contents_delegate_android/WebContentsDelegateAndroid.java

Index: components/web_contents_delegate_android/android/java/src/org/chromium/components/web_contents_delegate_android/WebContentsDelegateAndroid.java
diff --git a/components/web_contents_delegate_android/android/java/src/org/chromium/components/web_contents_delegate_android/WebContentsDelegateAndroid.java b/components/web_contents_delegate_android/android/java/src/org/chromium/components/web_contents_delegate_android/WebContentsDelegateAndroid.java
index baedee2154ba1a8cbf81721548357f47589a93d9..4e2cd5e452b7fd4a55e18e7258867c2ea823f859 100644
--- a/components/web_contents_delegate_android/android/java/src/org/chromium/components/web_contents_delegate_android/WebContentsDelegateAndroid.java
+++ b/components/web_contents_delegate_android/android/java/src/org/chromium/components/web_contents_delegate_android/WebContentsDelegateAndroid.java
@@ -115,4 +115,13 @@ public class WebContentsDelegateAndroid {
     public boolean isFullscreenForTabOrPending() {
         return false;
     }
+
+    /**
+     * Called from WebKit to request that the top controls be shown or hidden.
+     * The implementation should call ContentViewCore.showTopControls to actually
+     * show or hide the top controls.
+     */
+    @CalledByNative
+    public void didProgrammaticallyScroll(int scrollX, int scrollY) {
+    }
 }