DelegatedFrameHost should not allocate a new local surface id on frame eviction

content/browser/renderer_host/delegated_frame_host.h

Index: content/browser/renderer_host/delegated_frame_host.h
diff --git a/content/browser/renderer_host/delegated_frame_host.h b/content/browser/renderer_host/delegated_frame_host.h
index 01f4f656bd552e6f9d504fca3202b3eb12568f8b..0cba4c46a9ee6d4a2c640f0707efccb85e6a9c52 100644
--- a/content/browser/renderer_host/delegated_frame_host.h
+++ b/content/browser/renderer_host/delegated_frame_host.h
@@ -178,9 +178,7 @@ class CONTENT_EXPORT DelegatedFrameHost
     return cc::SurfaceId(frame_sink_id_, local_surface_id_);
   }
 
-  const cc::LocalSurfaceId& LocalSurfaceIdForTesting() const {
-    return local_surface_id_;
-  }
+  bool HasFrameForTesting() const { return has_frame_; }
 
   void OnCompositingDidCommitForTesting(ui::Compositor* compositor) {
     OnCompositingDidCommit(compositor);
@@ -339,6 +337,8 @@ class CONTENT_EXPORT DelegatedFrameHost
 
   bool needs_begin_frame_ = false;
 
+  bool has_frame_ = false;
+
   std::unique_ptr<DelegatedFrameEvictor> delegated_frame_evictor_;
 };