Fix crash when destroying a RenderWidgetHost that holds the pointer

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 4cc0c5bc1e2e1d7013ff2b7530738a287958566f..89389dea8b6b3b7d6d6e4526f7ee46f1a7747b12 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -623,6 +623,7 @@ class CONTENT_EXPORT WebContentsImpl
       RenderWidgetHostImpl* render_widget_host) const override;
   void LostCapture(RenderWidgetHostImpl* render_widget_host) override;
   void LostMouseLock(RenderWidgetHostImpl* render_widget_host) override;
+  bool HasMouseLock(RenderWidgetHostImpl* render_widget_host) override;
   void ForwardCompositorProto(RenderWidgetHostImpl* render_widget_host,
                               const std::vector<uint8_t>& proto) override;
   void OnRenderFrameProxyVisibilityChanged(bool visible) override;