Make commit for swap promises do not set can_cancel_commit.

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index f9a12e1a32f5cc80f706e3e97b03aaa75c3d6366..c5155b405d911cc0d946ea895e6e7997cdc4f3d5 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -1440,7 +1440,13 @@ void RenderWidget::QueueMessage(IPC::Message* msg,
 
   if (swap_promise) {
     compositor_->QueueSwapPromise(swap_promise.Pass());
-    compositor_->SetNeedsCommit();
+    // Request a commit. This might either A) request a commit ahead of time
+    // or B) request a commit which is not needed because there are not
+    // pending updates. If B) then the commit will be skipped and the swap
+    // promises will be broken (see EarlyOut_NoUpdates). To achieve that we
+    // call SetNeedsUpdateLayers instead of SetNeedsCommit so that
+    // can_cancel_commit is not unset.
+    compositor_->SetNeedsUpdateLayers();
   }
 }