Remove MojoCompositorFrameSink::EvictCurrentSurface

services/ui/ws/frame_generator_unittest.cc

 // Copyright 2017 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 "services/ui/ws/frame_generator.h"
 
 #include "base/macros.h"
 #include "cc/output/compositor_frame_sink.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "cc/test/begin_frame_args_test.h"
@@ skipping 46 matching lines @@
     if (needs_begin_frame == observing_begin_frames_)
       return;
 
     observing_begin_frames_ = needs_begin_frame;
     if (needs_begin_frame) {
       begin_frame_source_->AddObserver(this);
     } else
       begin_frame_source_->RemoveObserver(this);
   }
 
-  void EvictCurrentSurface() override {}
-
   // cc::BeginFrameObserver implementation.
   void OnBeginFrame(const cc::BeginFrameArgs& args) override {
     sink_client_->OnBeginFrame(args);
     last_begin_frame_args_ = args;
   }
 
   const cc::BeginFrameArgs& LastUsedBeginFrameArgs() const override {
     return last_begin_frame_args_;
   }
 
@@ skipping 200 matching lines @@
   InitWithSurfaceInfo();
 
   frame_generator()->OnWindowDamaged();
   IssueBeginFrame();
   EXPECT_EQ(2, NumberOfFramesReceived());
 }
 
 }  // namespace test
 }  // namespace ws
 }  // namespace ui