Invalidate on new picture if scale/content size changes

bug:6497496
Change-Id: Id6de6f83f7bf8a9a4ebcfed61e6b3985d7f19efe

1 files changed, 5 insertions, 1 deletions

diff --git a/core/java/android/webkit/ZoomManager.java b/core/java/android/webkit/ZoomManager.java
index 2247678d4867..1da59e400da8 100644
--- a/core/java/android/webkit/ZoomManager.java
+++ b/core/java/android/webkit/ZoomManager.java
@@ -1008,8 +1008,10 @@ class ZoomManager {
     /**
      * Updates zoom values when Webkit produces a new picture. This method
      * should only be called from the UI thread's message handler.
+     *
+     * @return True if zoom value has changed
      */
-    public void onNewPicture(WebViewCore.DrawData drawData) {
+    public boolean onNewPicture(WebViewCore.DrawData drawData) {
         final int viewWidth = mWebView.getViewWidth();
         final boolean zoomOverviewWidthChanged = setupZoomOverviewWidth(drawData, viewWidth);
         final float newZoomOverviewScale = getZoomOverviewScale();
@@ -1056,6 +1058,8 @@ class ZoomManager {
             // so next new picture could be forced into overview mode if it's true.
             mInitialZoomOverview = mInZoomOverview;
         }
+
+        return scaleHasDiff;
     }
 
     /**