Return resources immediately after a Surface is destroyed

content/browser/renderer_host/render_widget_host_view_aura_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <tuple>
@@ skipping 272 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(TestWindowObserver);
 };
 
 class FakeSurfaceObserver : public cc::SurfaceObserver {
  public:
   void OnSurfaceCreated(const cc::SurfaceInfo& surface_info) override {}
 
   void OnSurfaceDamaged(const cc::SurfaceId& id, bool* changed) override {
     *changed = true;
   }
+
+  void OnSurfaceDiscarded(const cc::SurfaceId& id) override {}
 };
 
 class FakeFrameSubscriber : public RenderWidgetHostViewFrameSubscriber {
  public:
   FakeFrameSubscriber(gfx::Size size, base::Callback<void(bool)> callback)
       : size_(size),
         callback_(callback),
         should_capture_(true),
         source_id_for_copy_request_(base::UnguessableToken::Create()) {}
 
@@ skipping 5239 matching lines @@
     // There is no composition in the beginning.
     EXPECT_FALSE(has_composition_text());
     SetHasCompositionTextToTrue();
     view->ImeCancelComposition();
     // The composition must have been canceled.
     EXPECT_FALSE(has_composition_text());
   }
 }
 
 }  // namespace content