Perform direct routing of mouse events when the pointer is locked.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index c8b38722cbd096c893ec16e258aae8768681b16b..71cf954b6982fc5df0ed8cef5b0d9d850074ab55 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -1961,6 +1961,13 @@ bool WebContentsImpl::HasMouseLock(RenderWidgetHostImpl* render_widget_host) {
          GetTopLevelRenderWidgetHostView()->IsMouseLocked();
 }
 
+RenderWidgetHostImpl* WebContentsImpl::MouseLockWidget() {
+  if (GetTopLevelRenderWidgetHostView()->IsMouseLocked())
+    return mouse_lock_widget_;
+
+  return nullptr;
+}
+
 void WebContentsImpl::ForwardCompositorProto(
     RenderWidgetHostImpl* render_widget_host,
     const std::vector<uint8_t>& proto) {