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

content/browser/renderer_host/delegated_frame_host.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_HOST_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 160 matching lines @@
   // client.
   bool TransformPointToCoordSpaceForView(const gfx::Point& point,
                                          RenderWidgetHostViewBase* target_view,
                                          gfx::Point* transformed_point);
 
   // Exposed for tests.
   cc::SurfaceId SurfaceIdForTesting() const {
     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);
   }
   bool ReleasedFrontLockActiveForTesting() const {
     return !!released_front_lock_.get();
   }
   void SetRequestCopyOfOutputCallbackForTesting(
       const base::Callback<void(std::unique_ptr<cc::CopyOutputRequest>)>&
           callback) {
@@ skipping 138 matching lines @@
       request_copy_of_output_callback_for_testing_;
 
   // YUV readback pipeline.
   std::unique_ptr<display_compositor::ReadbackYUVInterface>
       yuv_readback_pipeline_;
 
   std::unique_ptr<cc::ExternalBeginFrameSource> begin_frame_source_;
 
   bool needs_begin_frame_ = false;
 
+  bool has_frame_ = false;
+
   std::unique_ptr<DelegatedFrameEvictor> delegated_frame_evictor_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_HOST_H_