Propagate inert state to OOPIFs when a modal dialog is active

third_party/WebKit/public/web/WebFrameWidget.h

Index: third_party/WebKit/public/web/WebFrameWidget.h
diff --git a/third_party/WebKit/public/web/WebFrameWidget.h b/third_party/WebKit/public/web/WebFrameWidget.h
index ef2a0bb42dd713e74e0bd9fc389159ce0d8022bf..72f54eacb4c245a12a8f18fd1212c4132dc61379 100644
--- a/third_party/WebKit/public/web/WebFrameWidget.h
+++ b/third_party/WebKit/public/web/WebFrameWidget.h
@@ -117,6 +117,10 @@ class WebFrameWidget : public WebWidget {
   // This is needed for out-of-process iframes to know if they are clipped
   // by ancestor frames in another process.
   virtual void SetRemoteViewportIntersection(const WebRect&) {}
+
+  // Sets the inert bit on an out-of-process iframe, causing it to ignore
+  // input.
+  virtual void SetIsInert(bool) {}
 };
 
 }  // namespace blink