1 files changed, 19 insertions, 1 deletions
diff --git a/WebKit/mac/WebCoreSupport/WebFrameLoaderClient.mm b/WebKit/mac/WebCoreSupport/WebFrameLoaderClient.mm
index 5968084..c8285dc 100644
--- a/WebKit/mac/WebCoreSupport/WebFrameLoaderClient.mm
+++ b/WebKit/mac/WebCoreSupport/WebFrameLoaderClient.mm
@@ -1568,7 +1568,25 @@ public:
         else if (event->type() == eventNames().mouseoutEvent)
             [(WebBaseNetscapePluginView *)platformWidget() handleMouseExited:currentNSEvent];
     }
-    
+
+private:
+    virtual void notifyWidget(WidgetNotification notification)
+    {
+        switch (notification) {
+        case WillPaintFlattened: {
+            BEGIN_BLOCK_OBJC_EXCEPTIONS;
+            [(WebBaseNetscapePluginView *)platformWidget() cacheSnapshot];
+            END_BLOCK_OBJC_EXCEPTIONS;
+            break;
+        }
+        case DidPaintFlattened: {
+            BEGIN_BLOCK_OBJC_EXCEPTIONS;
+            [(WebBaseNetscapePluginView *)platformWidget() clearCachedSnapshot];
+            END_BLOCK_OBJC_EXCEPTIONS;
+            break;
+        }
+        }
+    }
 };
 
 #if USE(PLUGIN_HOST_PROCESS)