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

content/browser/renderer_host/render_widget_host_delegate.cc

Index: content/browser/renderer_host/render_widget_host_delegate.cc
diff --git a/content/browser/renderer_host/render_widget_host_delegate.cc b/content/browser/renderer_host/render_widget_host_delegate.cc
index d2740e3b8b8d2c16163d99525451b1e709ac6c93..31af17df29cf89bf463dfa6edb974263f8d8bb2b 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.cc
+++ b/content/browser/renderer_host/render_widget_host_delegate.cc
@@ -72,6 +72,10 @@ bool RenderWidgetHostDelegate::HasMouseLock(
   return false;
 }
 
+RenderWidgetHostImpl* RenderWidgetHostDelegate::MouseLockWidget() {
+  return nullptr;
+}
+
 TextInputManager* RenderWidgetHostDelegate::GetTextInputManager() {
   return nullptr;
 }